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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 17 — Aug. 26, 2013
  • pp: 20023–20031
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DFG-based mid-IR generation using a compact dual-wavelength all-fiber amplifier for laser spectroscopy applications

Karol Krzempek, Grzegorz Sobon, and Krzysztof M. Abramski  »View Author Affiliations


Optics Express, Vol. 21, Issue 17, pp. 20023-20031 (2013)
http://dx.doi.org/10.1364/OE.21.020023


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Abstract

We demonstrate a compact mid-infrared (mid-IR) radiation source based on difference frequency generation (DFG) in periodically poled lithium niobate (PPLN) crystal. The system incorporates a dual-wavelength master oscillator power amplifier (MOPA) source capable of simultaneous amplification of 1064 nm and 1548 nm signals in a common active fiber co-doped with erbium and ytterbium ions. Two low-power seed lasers were amplified by a factor of 14.4 dB and 23.7 dB for 1064 nm and 1548 nm, respectively and used in a nonlinear DFG setup to generate 1.14 mW of radiation centered at 3.4 μm. The system allowed for open-path detection of methane (CH4) in ambient air with estimated minimum detectable concentration at a level of 26 ppbv.

© 2013 Optical Society of America

1. Introduction

Mid-infrared (mid-IR) lasers are being rapidly developed all over the world. This fact is mainly due to the excellent usability of those sources in laser spectroscopy and remote gas sensing applications. The mid-IR wavelength region is covered with fundamental vibration and associated rotational-vibrational absorption bands of many molecules [1

1. R. F. Curl and F. K. Tittel, “Tunable infrared laser spectroscopy,” Annu. Rep. Prog. Chem., Sect. C 98, 219–272 (2002).

]. It is worth noting, that absorption bands located in the mid-IR are mostly several orders of magnitude more intense than the ones found in the near infrared wavelength region (0.8 µm – 2 µm). This fact, along with recent technological progress in mid-IR laser sources, allowed ultra-sensitive and selective detection of number of molecules [2

2. K. Krzempek, R. Lewicki, L. Nähle, M. Fischer, J. Koeth, S. Belahsene, Y. Rouillard, L. Worschech, and F. K. Tittel, “Continuous wave, distributed feedback diode laser based sensor for trace-gas detection of ethane,” Appl. Phys. B 106(2), 251–255 (2012). [CrossRef]

5

5. A. A. Kosterev, Y. A. Bakhirkin, F. K. Tittel, S. McWhorter, and B. Ashcraft, “QEPAS methane sensor performance for humidified gases,” Appl. Phys. B 92(1), 103–109 (2008). [CrossRef]

]. Amongst many other trace gas sensing techniques laser absorption spectroscopy provides many advantageous solutions. Compactness and low power consumption of new type of laser sources allowed to design and build small and portable detection systems which are capable of detecting slight fluctuations of various molecules, including bio-markers which aid in early disease recognition [6

6. M. R. McCurdy, A. Sharafkhaneh, H. Abdel-Monem, J. Rojo, and F. K. Tittel, “Exhaled nitric oxide parameters and functional capacity in chronic obstructive pulmonary disease,” J Breath Res 5(1), 016003 (2011). [CrossRef] [PubMed]

,7

7. R. Lewicki, A. A. Kosterev, D. M. Thomazy, T. H. Risby, S. Solga, T. B. Schwartz, and F. K. Tittel, “Real time ammonia detection in exhaled human breath using a distributed feedback quantum cascade laser based sensor,” Proc. SPIE 7945, 79450K–2 (2011). [CrossRef]

]. Commonly available mid-IR laser sources, suitable for laser spectroscopy, can be split into four main groups: gas lasers, quantum cascade lasers (QCLs), solid state lasers and frequency conversion-based laser sources [8

8. F. K. Tittel, D. Richter, A. Fried, I. T. Sorokina, and K. L. Vodopyanov, “Mid-Infrared Laser Applications in Spectroscopy,” Top. Appl. Phys. 89, 458–516 (2003) (Solid-State Mid-Infrared Laser Sources). [CrossRef]

]. Each approach has its advantages and disadvantages. The main pros of mid-IR sources based on DFG effects are narrow linewidth, capability of long-term Continuous Wave (CW) operation and wide and non-complex tuning [9

9. D. Richter, D. Lancaster, R. Curl, W. Neu, and F. K. Tittel, “Compact mid-infrared trace gas sensor based on difference-frequency generation of two diode lasers in periodically poled LiNbO3,” Appl. Phys. B 67(3), 347–350 (1998). [CrossRef]

]. Several approaches to DFG are commonly known in the laser community. One can find systems using separate solid state lasers [10

10. S. Stry, P. Hering, and M. Mürtz, “Portable difference-frequency laser-based cavity leak-out spectrometer for trace-gas analysis,” Appl. Phys. B 75(2-3), 297–303 (2002). [CrossRef]

,11

11. V. L. Kasyutich, R. J. Holdsworth, and P. A. Martin, “Mid-infrared laser absorption spectrometers based upon all-diode laser difference frequency generation and a room temperature quantum cascade laser for the detection of CO, N2O and NO,” Appl. Phys. B 92(2), 271–279 (2008). [CrossRef]

] or fiber based radiation sources [12

12. L. Goldberg, D. G. Lancaster, J. Koplow, R. F. Curl, and F. K. Tittel, “Mid-IR DFG source pumped by a 1.1 μm/1.5 μm dual wavelength fiber amplifier for trace gas detection,” Opt. Lett. 23, 1517–1519 (1998). [CrossRef] [PubMed]

,13

13. J. Chang, Q. Mao, S. Feng, X. Gao, and C. Xu, “Widely tunable mid-IR difference-frequency generation based on fiber lasers,” Opt. Lett. 35(20), 3486–3488 (2010). [CrossRef] [PubMed]

]. This report will focus on using an all-fiber MOPA source in a DFG setup. Fiber MOPA sources can provide multi-watt-level output powers while maintaining excellent beam quality. Cascaded design of the amplifier allows for easy control of the amplified radiation through controlling the parameters of low power, relatively cheap, off-the-shelf seed diodes [14

14. G. Sobon, P. Kaczmarek, A. Antonczak, J. Sotor, A. Waz, and K. M. Abramski, “Pulsed dual-stage Fiber-MOPA source operating at 1550 nm with arbitrarily shaped output pulses,” Appl. Phys. B 105(4), 721–727 (2011). [CrossRef]

]. The combination of the MOPA wide amplification bandwidth and DFG systems allows for very wide tuning of the generated mid-IR radiation. Moreover, all-fiber design of the amplifiers assures robustness and compactness of the design, which in turn could lead to development of small, transportable mid-IR sources. Recently, we have demonstrated a compact, all-fiber setup capable of generating two wavelengths (1064 and 1550 nm) simultaneously in one active fiber with watt-level output power and single-mode beam [15

15. G. Sobon, P. Kaczmarek, A. Antonczak, J. Sotor, and K. M. Abramski, “Controlling the 1 μm spontaneous emission in Er/Yb co-doped fiber amplifiers,” Opt. Express 19(20), 19104–19113 (2011). [CrossRef] [PubMed]

]. Such system seems to be an ideal pumping source for PPLN crystals in order to generate mid-IR radiation in the 3.38 – 3.40 µm range via DFG nonlinear processes. In this work we demonstrate the first attempt, to the best of our knowledge, of utilizing the dual-wavelength fiber MOPA as a simple and efficient source for DFG process, allowing generation of more than 1 mW of laser radiation centered at 3.4 µm. The overall performance and stability of the system was determined by performing simple methane (CH4) measurements in ambient air using Tunable Diode Laser Spectroscopy (TDLAS) technique.

2. Dual-wavelength amplifier

The pumping source for the PPLN crystal in our experiments is designed in a MOPA scheme and consists of an Er:Yb co-doped fiber amplifier (EYDFA) seeded by two lasers: operating at 1.55 µm and 1.06 µm wavelengths. The dual-seeding technique of EYDFAs was firstly proposed by Kuhn et al. as an efficient method of suppressing the amplified spontaneous emission (ASE) and parasitic lasing from the Yb ions in the amplifiers operating at nominal 1550 nm wavelength [16

16. V. Kuhn, P. Wessels, J. Neumann, and D. Kracht, “Stabilization and power scaling of cladding pumped Er:Yb-codoped fiber amplifier via auxiliary signal at 1064 nm,” Opt. Express 17(20), 18304–18311 (2009). [CrossRef] [PubMed]

,17

17. V. Kuhn, D. Kracht, J. Neumann, and P. Wessels, “Dependence of Er:Yb-codoped 1.5 μm amplifier on wavelength-tuned auxiliary seed signal at 1 μm wavelength,” Opt. Lett. 35(24), 4105–4107 (2010). [CrossRef] [PubMed]

]. Our further work revealed, that certain commercially available Er:Yb co-doped fibers (EYDFs) are suitable for very efficient dual-wavelength amplification and the gain at 1.06 µm might be only 6 dB lower than at the nominal 1.55 µm wavelength [18

18. Y. L. Lee, C. Jung, Y. Noh, D. Ko, and J. Lee, “Photorefractive Effect in a Periodically Poled Ti:LiNbO3 Channel Waveguide,” J. Korean Phys. Soc. 44, 267 (2004).

]. Such MOPA might serve as an ideal dual-wavelength source for pumping of PPLN crystals and generating radiation in the mid-IR, centered near 3.4 µm. The setup of the double-seeded Er:Yb co-doped fiber amplifier (DS-EYDFA) is shown in Fig. 1
Fig. 1 Dual-wavelength amplifier source. ISO- fiber isolator, EDFA- erbium-doped fiber amplifier, WDM-wavelength division multiplexer, CMS- cladding mode stripper, PC- fiber-based polarization controller
. The amplifier is seeded by two signals from DFB laser diodes operating at 1548 nm and 1064 nm. The 1548 nm signal, was additionally pre-amplified in an erbium-doped fiber amplifier (EDFA), which provides ~11 dB gain. Both signals are combined in a wavelength division multiplexing (WDM) coupler and directed to the active fiber (Nufern SM-EYDF-7/130). The EYDF is backward-pumped by two 975 nm laser diodes, delivering in total 20 W of power. The pumping beam is coupled into the EYDF through a multimode pump-combiner. The pump power, which is not absorbed by the active fiber is rejected by a cladding mode stripper (CMS). After amplification, both signals are separated and directed to fiber isolators, in order to avoid unwanted back-reflections and parasitic lasing.

Several measurements of the dual-wavelength amplifier were performed in order to determine its usefulness for mid-IR generation via nonlinear DFG processes occurring in PPLN crystals.

Output power for both wavelengths as a function of pump power along with their 20 minute stability are depicted in Fig. 2
Fig. 2 Amplified output powers as a function of pump power (a), registered 20 min amplifier power stability (b).
. At maximum pump power the amplifier delivered more than 1.1 W of 1.06 μm radiation and 4 W of 1.55 μm radiation. Output power fluctuations were registered at half of the maximum pump capability due to power limitation of measuring device used (Accelink, PMSII-B). 20 minute power instabilities did not exceed 3.8% and 1.7% for 1.06 μm and 1.55 μm wavelength, respectively. Slow oscillations along with a gentle drift was recorded. This was probably caused by insufficient temperature stabilization of the pump diodes. Slow temperature drift of the diode structure caused shifts of the pumping wavelength, which in return produced variations in active fiber absorption efficiency and therefore in output power of both wavelengths. The pump diodes were mounted on one Peltier-cooled heat-sink attached to a water-cooled aluminum block. Sinusoidal oscillations were caused by PID controller overshooting the current delivered to the Peltier elements, whereas the drift was caused by slow heating-up of the liquid in the closed-circuit water-cooling system. This problem will be addressed in the future by using a more sophisticated heat dissipation system for the multimode pump diodes.

Optical spectra of both amplified signals registered using 0.01 nm resolution and high sensitivity at maximum pump power are depicted in Fig. 3
Fig. 3 Optical spectra gathered at maximum pump power injected to the amplifier, (a) – 1064 nm, (b) – 1550 nm.
.

Both signals had a very good signal to noise ratio (SNR), reaching 57dB and 60dB for 1 μm and 1.5 μm wavelength, respectively. No signs of Q-switching were observed in the amplifier. In order to characterize the designed amplifier as an dual-wavelength source for DFG processes additional polarization properties of the output radiation were registered. Degree of polarization (DOP) of both wavelength at maximum output power are depicted in Fig. 4
Fig. 4 Degree of polarization fluctuations at maximum pump power conditions.
.

For 1 μm wavelength the 60 minute fluctuations did not exceed 1.7 and 3 degrees for azimuth and ellipticity, respectively. The 1.5 μm radiation performed better, yielding variations less than 1.6 and 2.3 degrees for azimuth and ellipticity, respectively.

3. DFG experimental setup and performance

The dual-wavelength source delivers the radiation through a standard FC/APC SMF-28 fiber connector. In order to minimize the number of elements incorporated in the system we used a simplified optical setup. Both laser beams (1 μm and 1.5 μm) emerging from the fiber tip are collimated using an Anti-Reflection coated (AR-coted) standard achromatic doublet lens (Thorlabs AC080-010-C-ML). The beams are then focused by means of an AR-coated achromatic doublet lens (Thorlabs AC254-150-C) with a focal length of 150 mm to spots of diameter equal to 70 μm and 145 μm, for 1 μm and 1.5 μm wavelength, respectively. The profiles of the focused beams can be seen in Fig. 7
Fig. 7 Beam profiles at focusing point.
.

The registered M2 parameters were 1.21 and 1.19 for 1 μm and 1.5 μm wavelength, respectively. Although using an achromatic-doublet-based lens system, the offset between the focusing points of both beams was 9.1 mm (measured in air). The beams were focused into a temperature stabilized, 40 mm long, multi-band AR-coated, Magnesium-doped PPLN crystal (Covesion MOPO1-0.5-40). The crystal offers 9 channels with apertures of 0.5x0.5 mm and periods ranging from 27.91 to 31.59 μm. With adequate period selection, temperature and signal tuning, idler generation stretching from 2128 – 4335 nm is possible. In our case, for Pump and Signal wavelength centered around 1064 nm and 1548 nm, respectively, the 29.98 µm period was used along with temperature stabilization of the crystal at 169°C ( ± 0.01). Relatively high crystal temperature was chosen to reduce the effects of photorefractive damage at high incident powers [19

19. D. Richter, B. Wert, A. Fried, P. Weibring, J. Walega, J. White, B. Vaughn, and F. K. Tittel, “High precision carbon dioxide isotope spectrometer with a difference frequency generation laser source,” Opt. Lett. 34, 172–174 (2009). [CrossRef] [PubMed]

]. At the PPLN crystal output a f = 75 mm, AR-coted, Calcium-Fluoride lens was used (Thorlabs, LA5817-E) to collimate the generated mid-IR radiation. The additional germanium filter was integrated in the system to filter out the un-absorbed Pump and Signal radiation. The collimated mid-IR beam is focused on a three-stage Thermoelectrically cooled (TEC) MCT detector (VIGO, PVI-3TE4) via an off-axis parabolic mirror (Thorlabs, MPD254762-90-P01) after traveling 8 meters in ambient air under atmospheric pressure. Signal recovery was performed with a Lock-in Amplifier (Stanford Research Systems, SR830, LIA) and the signal was observed and registered using an oscilloscope (AT DSO9254A). Figure 8
Fig. 8 Idler output power as a function of power delivered to the PPLN crystal.
shows generated Idler power as a function of power delivered to the PPLN crystal.

4. TDLAS 2f ambient methane measurements

The overall performance of the DFG system was evaluated by carrying out spectroscopic measurements of methane concentrations in ambient air at an mid-IR beam power of approximately 60 μW. Low mid-IR power was deliberately used not to saturate the detector. We targeted a strong methane absorption line centered at 3403 nm (~2938.3 cm−1) which partially overlaps with a weak water absorption line, but at the same time is interference free from other molecules normally present in ambient air. Assuming the concentration of ambient methane will not drop below ~500 ppm, the sensor will still measure the targeted absorption line with little influence of water background. Hitran [20] spectral simulation of methane and water absorption lines around 2938 cm−1 for an open-path interaction length of 8 m can be seen in Fig. 9
Fig. 9 Hitran spectral simulation of absorption lines of 4% water and 1.8 ppmv of methane in ambient air for an optical pathlength of 8m.
.

In order to detect methane absorption lines we used TDLAS technique. In our case the wavelength of the first seed diode was kept stable at a wavelength of 1064 nm and the mid-IR Idler frequency tuning was achieved by varying the injected current to the 1.5 μm seed diode. According to (1) [21

21. I. Armstrong, W. Johnstone, K. Duffin, M. Lengden, A. Chakraborty, and K. Ruxton, “Detection of CH4 in the mid-IR using difference frequency generation with tunable diode laser spectroscopy,” J. Lightwave Technol. 28(10), 1435–1442 (2010). [CrossRef]

], assuming a fixed Pump wavelength – λp, a linear change of the Signal wavelength – λs will result in a linear change of the generated Idler wavelength – λi:
1λp1λS1λi=0.
(1)
An 100 mHz triangular-shaped ramp with an amplitude of 400 mV along with an superimposed 9 kHz sinusoidal 100 mV modulation was applied to the modulation input of the 1.5 μm seed diode driver. The 400 mV ramping signal corresponded to current tuning of the seed diode equal to 0.65 nm. The modulation depth and frequency was determined experimentally to obtain best signal parameters for methane absorption lines under atmospheric pressures. The sinusoidal signal was also provided for the LIA as a reference for signal retrieval purposes. Both ramping and modulation signal were formed by an arbitrary signal generator (Tektronix, AFG3102) and superimposed by a simple Op-Amp circuit before reaching the external modulation input of the 1.5 μm seed diode Laser Diode Driver (LDD). The 2f detection of ambient methane absorption lines at a free-space interaction length of 8 m are depicted in Fig. 10(a)
Fig. 10 2f absorption signal of ambient methane under atmospheric pressure (a). Inset- saturated absorption signal after fanning-in pure methane into the laboratory room (b).
. Figure 10(b) shows a 2f signal with signs of detector saturation after rising the methane concentration in the laboratory by fanning-in pure methane released from a cylinder.

5. Conclusions

Acknowledgment

The work presented in this paper was supported by the National Science Centre (NCN, Poland) under the project entitled “Generation of mid-infrared radiation using novel dual-wavelength all-fiber laser sources” (decision no. DEC-2012/07/B/ST7/01476). The research fellowship of two of the authors (K.K. and G.S.) is co-financed by the European Union as part of the European Social Fund.

References and links

1.

R. F. Curl and F. K. Tittel, “Tunable infrared laser spectroscopy,” Annu. Rep. Prog. Chem., Sect. C 98, 219–272 (2002).

2.

K. Krzempek, R. Lewicki, L. Nähle, M. Fischer, J. Koeth, S. Belahsene, Y. Rouillard, L. Worschech, and F. K. Tittel, “Continuous wave, distributed feedback diode laser based sensor for trace-gas detection of ethane,” Appl. Phys. B 106(2), 251–255 (2012). [CrossRef]

3.

C. A. Zaugg, R. Lewicki, T. Day, R. F. Curl, and F. K. Tittel, “Faraday rotation spectroscopy of nitrogen dioxide based on a widely tunable external cavity quantum cascade laser,” Proc. SPIE 7945, 79450O (2011). [CrossRef]

4.

V. Spagnolo, A. A. Kosterev, L. Dong, R. Lewicki, and F. K. Tittel, “NO trace gas sensor based on quartz enhanced photoacoustic spectroscopy and external cavity quantum cascade laser,” Appl. Phys. B 100(1), 125–130 (2010). [CrossRef]

5.

A. A. Kosterev, Y. A. Bakhirkin, F. K. Tittel, S. McWhorter, and B. Ashcraft, “QEPAS methane sensor performance for humidified gases,” Appl. Phys. B 92(1), 103–109 (2008). [CrossRef]

6.

M. R. McCurdy, A. Sharafkhaneh, H. Abdel-Monem, J. Rojo, and F. K. Tittel, “Exhaled nitric oxide parameters and functional capacity in chronic obstructive pulmonary disease,” J Breath Res 5(1), 016003 (2011). [CrossRef] [PubMed]

7.

R. Lewicki, A. A. Kosterev, D. M. Thomazy, T. H. Risby, S. Solga, T. B. Schwartz, and F. K. Tittel, “Real time ammonia detection in exhaled human breath using a distributed feedback quantum cascade laser based sensor,” Proc. SPIE 7945, 79450K–2 (2011). [CrossRef]

8.

F. K. Tittel, D. Richter, A. Fried, I. T. Sorokina, and K. L. Vodopyanov, “Mid-Infrared Laser Applications in Spectroscopy,” Top. Appl. Phys. 89, 458–516 (2003) (Solid-State Mid-Infrared Laser Sources). [CrossRef]

9.

D. Richter, D. Lancaster, R. Curl, W. Neu, and F. K. Tittel, “Compact mid-infrared trace gas sensor based on difference-frequency generation of two diode lasers in periodically poled LiNbO3,” Appl. Phys. B 67(3), 347–350 (1998). [CrossRef]

10.

S. Stry, P. Hering, and M. Mürtz, “Portable difference-frequency laser-based cavity leak-out spectrometer for trace-gas analysis,” Appl. Phys. B 75(2-3), 297–303 (2002). [CrossRef]

11.

V. L. Kasyutich, R. J. Holdsworth, and P. A. Martin, “Mid-infrared laser absorption spectrometers based upon all-diode laser difference frequency generation and a room temperature quantum cascade laser for the detection of CO, N2O and NO,” Appl. Phys. B 92(2), 271–279 (2008). [CrossRef]

12.

L. Goldberg, D. G. Lancaster, J. Koplow, R. F. Curl, and F. K. Tittel, “Mid-IR DFG source pumped by a 1.1 μm/1.5 μm dual wavelength fiber amplifier for trace gas detection,” Opt. Lett. 23, 1517–1519 (1998). [CrossRef] [PubMed]

13.

J. Chang, Q. Mao, S. Feng, X. Gao, and C. Xu, “Widely tunable mid-IR difference-frequency generation based on fiber lasers,” Opt. Lett. 35(20), 3486–3488 (2010). [CrossRef] [PubMed]

14.

G. Sobon, P. Kaczmarek, A. Antonczak, J. Sotor, A. Waz, and K. M. Abramski, “Pulsed dual-stage Fiber-MOPA source operating at 1550 nm with arbitrarily shaped output pulses,” Appl. Phys. B 105(4), 721–727 (2011). [CrossRef]

15.

G. Sobon, P. Kaczmarek, A. Antonczak, J. Sotor, and K. M. Abramski, “Controlling the 1 μm spontaneous emission in Er/Yb co-doped fiber amplifiers,” Opt. Express 19(20), 19104–19113 (2011). [CrossRef] [PubMed]

16.

V. Kuhn, P. Wessels, J. Neumann, and D. Kracht, “Stabilization and power scaling of cladding pumped Er:Yb-codoped fiber amplifier via auxiliary signal at 1064 nm,” Opt. Express 17(20), 18304–18311 (2009). [CrossRef] [PubMed]

17.

V. Kuhn, D. Kracht, J. Neumann, and P. Wessels, “Dependence of Er:Yb-codoped 1.5 μm amplifier on wavelength-tuned auxiliary seed signal at 1 μm wavelength,” Opt. Lett. 35(24), 4105–4107 (2010). [CrossRef] [PubMed]

18.

Y. L. Lee, C. Jung, Y. Noh, D. Ko, and J. Lee, “Photorefractive Effect in a Periodically Poled Ti:LiNbO3 Channel Waveguide,” J. Korean Phys. Soc. 44, 267 (2004).

19.

D. Richter, B. Wert, A. Fried, P. Weibring, J. Walega, J. White, B. Vaughn, and F. K. Tittel, “High precision carbon dioxide isotope spectrometer with a difference frequency generation laser source,” Opt. Lett. 34, 172–174 (2009). [CrossRef] [PubMed]

20.

http://hitran.iao.ru

21.

I. Armstrong, W. Johnstone, K. Duffin, M. Lengden, A. Chakraborty, and K. Ruxton, “Detection of CH4 in the mid-IR using difference frequency generation with tunable diode laser spectroscopy,” J. Lightwave Technol. 28(10), 1435–1442 (2010). [CrossRef]

22.

S. D. Bridgham, H. Cadillo-Quiroz, J. K. Keller, and Q. Zhuang, “Methane emissions from wetlands: biogeochemical, microbial, and modeling perspectives from local to global scales,” Glob. Change Biol. 19(5), 1325–1346 (2013). [CrossRef] [PubMed]

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(300.6340) Spectroscopy : Spectroscopy, infrared
(190.4223) Nonlinear optics : Nonlinear wave mixing

ToC Category:
Spectroscopy

History
Original Manuscript: May 10, 2013
Revised Manuscript: July 12, 2013
Manuscript Accepted: July 21, 2013
Published: August 19, 2013

Citation
Karol Krzempek, Grzegorz Sobon, and Krzysztof M. Abramski, "DFG-based mid-IR generation using a compact dual-wavelength all-fiber amplifier for laser spectroscopy applications," Opt. Express 21, 20023-20031 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-17-20023


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References

  1. R. F. Curl and F. K. Tittel, “Tunable infrared laser spectroscopy,” Annu. Rep. Prog. Chem., Sect. C98, 219–272 (2002).
  2. K. Krzempek, R. Lewicki, L. Nähle, M. Fischer, J. Koeth, S. Belahsene, Y. Rouillard, L. Worschech, and F. K. Tittel, “Continuous wave, distributed feedback diode laser based sensor for trace-gas detection of ethane,” Appl. Phys. B106(2), 251–255 (2012). [CrossRef]
  3. C. A. Zaugg, R. Lewicki, T. Day, R. F. Curl, and F. K. Tittel, “Faraday rotation spectroscopy of nitrogen dioxide based on a widely tunable external cavity quantum cascade laser,” Proc. SPIE7945, 79450O (2011). [CrossRef]
  4. V. Spagnolo, A. A. Kosterev, L. Dong, R. Lewicki, and F. K. Tittel, “NO trace gas sensor based on quartz enhanced photoacoustic spectroscopy and external cavity quantum cascade laser,” Appl. Phys. B100(1), 125–130 (2010). [CrossRef]
  5. A. A. Kosterev, Y. A. Bakhirkin, F. K. Tittel, S. McWhorter, and B. Ashcraft, “QEPAS methane sensor performance for humidified gases,” Appl. Phys. B92(1), 103–109 (2008). [CrossRef]
  6. M. R. McCurdy, A. Sharafkhaneh, H. Abdel-Monem, J. Rojo, and F. K. Tittel, “Exhaled nitric oxide parameters and functional capacity in chronic obstructive pulmonary disease,” J Breath Res5(1), 016003 (2011). [CrossRef] [PubMed]
  7. R. Lewicki, A. A. Kosterev, D. M. Thomazy, T. H. Risby, S. Solga, T. B. Schwartz, and F. K. Tittel, “Real time ammonia detection in exhaled human breath using a distributed feedback quantum cascade laser based sensor,” Proc. SPIE7945, 79450K–2 (2011). [CrossRef]
  8. F. K. Tittel, D. Richter, A. Fried, I. T. Sorokina, and K. L. Vodopyanov, “Mid-Infrared Laser Applications in Spectroscopy,” Top. Appl. Phys.89, 458–516 (2003) (Solid-State Mid-Infrared Laser Sources). [CrossRef]
  9. D. Richter, D. Lancaster, R. Curl, W. Neu, and F. K. Tittel, “Compact mid-infrared trace gas sensor based on difference-frequency generation of two diode lasers in periodically poled LiNbO3,” Appl. Phys. B67(3), 347–350 (1998). [CrossRef]
  10. S. Stry, P. Hering, and M. Mürtz, “Portable difference-frequency laser-based cavity leak-out spectrometer for trace-gas analysis,” Appl. Phys. B75(2-3), 297–303 (2002). [CrossRef]
  11. V. L. Kasyutich, R. J. Holdsworth, and P. A. Martin, “Mid-infrared laser absorption spectrometers based upon all-diode laser difference frequency generation and a room temperature quantum cascade laser for the detection of CO, N2O and NO,” Appl. Phys. B92(2), 271–279 (2008). [CrossRef]
  12. L. Goldberg, D. G. Lancaster, J. Koplow, R. F. Curl, and F. K. Tittel, “Mid-IR DFG source pumped by a 1.1 μm/1.5 μm dual wavelength fiber amplifier for trace gas detection,” Opt. Lett.23, 1517–1519 (1998). [CrossRef] [PubMed]
  13. J. Chang, Q. Mao, S. Feng, X. Gao, and C. Xu, “Widely tunable mid-IR difference-frequency generation based on fiber lasers,” Opt. Lett.35(20), 3486–3488 (2010). [CrossRef] [PubMed]
  14. G. Sobon, P. Kaczmarek, A. Antonczak, J. Sotor, A. Waz, and K. M. Abramski, “Pulsed dual-stage Fiber-MOPA source operating at 1550 nm with arbitrarily shaped output pulses,” Appl. Phys. B105(4), 721–727 (2011). [CrossRef]
  15. G. Sobon, P. Kaczmarek, A. Antonczak, J. Sotor, and K. M. Abramski, “Controlling the 1 μm spontaneous emission in Er/Yb co-doped fiber amplifiers,” Opt. Express19(20), 19104–19113 (2011). [CrossRef] [PubMed]
  16. V. Kuhn, P. Wessels, J. Neumann, and D. Kracht, “Stabilization and power scaling of cladding pumped Er:Yb-codoped fiber amplifier via auxiliary signal at 1064 nm,” Opt. Express17(20), 18304–18311 (2009). [CrossRef] [PubMed]
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