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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 5 — Mar. 1, 2010
  • pp: 4695–4700
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Simultaneous 3 × 10 Gbps optical data transmission in 1-μm, C-, and L-wavebands over a single holey fiber using an ultra-broadband photonic transport system

Naokatsu Yamamoto, Yu Omigawa, Kouichi Akahane, Tetsuya Kawanishi, and Hideyuki Sotobayashi  »View Author Affiliations


Optics Express, Vol. 18, Issue 5, pp. 4695-4700 (2010)
http://dx.doi.org/10.1364/OE.18.004695


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Abstract

An ultra-broadband photonic transport system has been developed to expand the usable wavelength bandwidth for optical communication. Simultaneous 3 × 10-Gbps error-free photonic transmissions are demonstrated in the 1-μm, C-, and L-wavebands by using the ultra-broadband photonic transport system over a 5.4-km-long holey fiber transmission line.

© 2010 OSA

1. Introduction

The ever-growing demand for high data transmission capacities has necessitated the use of alternative wavebands and the development of methods for enhancing the transmission capacities of existing photonic networks. Photonic transport systems in the C- and L-bands (C-band: 1530–1565 nm and L-band: 1565–1625 nm) have been extensively employed in conventional photonic networks [1

1. A. H. Gnauck, G. Charlet, P. Tran, P. Winzer, C. Doerr, J. Centanni, E. Burrows, T. Kawanishi, T. Sakamoto, and K. Higuma, “25.6-Tb/s C+L-Band Transmission of Polarization-Multiplexed RZ-DQPSK Signals,” in Proc. of OFC2007, Anaheim, CA, PDP19.

]. We have recently focused on the development of a wavelength band having a wavelength range shorter than that of the O-band (1260–1360 nm), such as the 1-μm waveband. This 1-μm waveband is a novel and attractive waveband that can be used in future photonic transport systems assuming that optical frequency resources greater than approximately 10-THz can be employed in this waveband [2

2. N. Yamamoto and H. Sotobayashi, “All-band photonic transport system and its device,” Proc. SPIE 7235, 72350C (2009). [CrossRef]

4

4. K. Kurokawa, K. Tsujikawa, K. Tajima, K. Nakajima, and I. Sankawa, “10 Gb/s WDM transmission at 1064 and 1550 nm over 24km PCF with negative power penalties,” Proc. of OECC2007, Yokohama, 12C1–3.

]. Moreover, the existing ytterbium-doped fiber amplifiers (YDFAs) can be used as 1R repeaters in the 1-μm waveband [5

5. R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, “Ytterbiumdoped fiber amplifiers,” IEEE J. Quantum Electron. 33(7), 1049–1056 (1997). [CrossRef]

]. High-performance and green photonic devices such as high-power lasers, quantum dot lasers [6

6. R. Katouf, N. Yamamoto, K. Akahane, T. Kawanishi, and H. Sotobayashi, “1-µm- band transmission by use of a wavelength tunable quantum-dot laser over a hole-assisted fiber,” Proc. SPIE 7234, 72340G (2009). [CrossRef]

9

9. N. Yamamoto, K. Akahane1, T. Kawanishi, R. Katouf, and H. Sotobayashi, “Quantum dot optical frequency comb laser with mode-selection technique for 1-μm waveband photonic transport system,” Jpn. J. Appl. Phys. (to be published).

], YDFAs, and group-IV semiconductor-based high-speed photonic receivers [10

10. H. Hasegawa, Y. Oikawa, M. Yoshida, T. Hirooka, and M. Nakazawa, “10Gb/s transmission over 5 km at 850nm using single-mode photonic crystal fiber, single-mode VCSEL, and Si-APD,” IEICE Electron. Express 3(6), 109–114 (2006). [CrossRef]

] are compatible with this waveband.

The expansion of the usable bandwidth of optical frequency resources used in future photonic network systems employing wavelength division multiplexing (WDM) can be achieved by combining the 1-μm waveband with conventional wavebands such as the C- and L-bands. Therefore, we propose an ultra-broadband photonic transport system that is compatible with both the novel and conventional wavebands. In the proposed system, a holeyfiber (HF) has been developed that is capable of data transmissions over a few kilometers-long (typical length: 5.4 km) and is used as the photonic transmission line for the ultra-broadband system [11

11. K. Mukasa, K. Imamura, R. Sugizaki, and T. Yagi, “Comparisons of merits on wideband transmission systems between using extremely improved solid SMFs with Aeff of 160mm2 and loss of 0.175dB/km and using large-Aeff holey fibers enabling transmission over 600nm bandwidth,” Proc. of OFC2008, San Diego, OThR1.

, 12

12. K. Mukasa, R. Miyabe, K. Imamura, K. Aiso, R. Sugizaki, and T. Yagi, “Hole assisted fibers (HAFs) and holey fibers (HFs) for short-wavelength applications,” Proc. SPIE 6769, 67690J (2007).

]. In this study, we successfully demonstrated simultaneous 10-Gbps optical data transmissions in the 1-μm, C-, and L-wavebands by using the ultra-broadband photonic transport system.

2. Development of ultra-broadband photonic transport system

Figure 1
Fig. 1 Ultra-broadband photonic transport system using a holey fiber transmission line
shows the experimental setup for demonstrating the working of the ultra-broadband photonic transport system. Distributed-feedback (DFB) semiconductor laser diodes with wavelengths of 1059.18 nm, 1550.44 nm, and 1569.80 nm were used as the light sources for the 1-μm, C-, and L- wavebands, respectively. Two LiNbO3 modulators were used for producing a data stream in the 1-μm, C-, and L-wavebands. In this experiment, a pseudo-random binary sequence (PRBS, lengths: 27-1 and 215-1) data of a non-return-to-zero (NRZ) on-off-keying (OOK) signal at 9.953 Gbps (OC-192, STM-64) was generated in each waveband. The modulated optical signal in the 1-μm waveband was amplified by using a YDFA after the optical signal was passed through an arrayed-waveguide grating (AWG) device. The C- and L-bands were combined using the AWG device and the modulated optical signal in these bands was amplified by using an Er-doped fiber amplifier (EDFA). These AWG devices act as wavelength multiplexers (MUX) for the multi-wavelength optical signals in the 1-μm, C-, and L-wavebands. A number of channels, channel spacing, and insertion loss of the AWG device for the 1-μm waveband are confirmed to be respectively 40-channels, 100 GHz, and < 3 dB. In this experiment, a channel No. 2 was used for the 1-μm waveband transmission. Additionally, the AWG device for the C- and L-wavebands is characterized as a 128-channels, 100 GHz channel spacing, and < 6 dB of an insertion loss. The AWG device covers a bandwidth of the both of C- and L-wavebands. WDM couplers were used at the ends of the transmission line to combine and separate the optical signals of the 1-μm, C-, and L-wavebands. The WDM coupler is also characterized as a < 0.16 dB of a low insertion loss, and > 28 dB of isolation in the both of 1-μm, and C-wavebands. Specific center wavelengths of the WDM coupler are 1045- and 1550-nm. Naturally, we confirmed that three wavelengths used in the experiment can pass through the WDM couplers with the low insertion loss.

The eye-diagrams were obtained using a communication analyzer and the bit error rate (BER) of the output electrical signal from the photonic receiver was measured by using a BER tester. Additionally, the optical spectra before and after the transmission were also observed by using an optical spectrum analyzer (OSA).

3. Transmission characteristics of ultra-broadband photonic transport system

Figures 3(a)
Fig. 3 Optical spectra (a) before transmission, (b) after transmission, and (c) optical spectra in 1-μm, C-, and L-wavebands at the receiving port-A of the 1-μm waveband
and 3(b) show the optical spectra before and after the transmission, respectively, over a wide wavelength range. Three peaks pertaining to the optical signals in the 1-μm, C-, and L-wavebands are clearly observed at the wavelengths of 1059.18 nm, 1550.44 nm, and 1569.80 nm, before and after transmission. The observation of these three peaks indicates that simultaneous photonic transmissions in the 1-μm, C-, and L-wavebands can be achieved over the 5.4-km-long HF transmission line. Figure 3(c) shows an optical spectrum observed at the receiving port A of the 1-μm waveband illustrated in Fig. 1. A peak at 1059.18 nm is also clearly observed in the spectra obtained at port A. On the other hand, in the spectra observed at the receiving port A, peaks were absent at wavelengths within the wavelength range of the C- and L-bands. The cross-talk between the 1-μm waveband and the C- and L-bands is less than –56 dB. It is also confirmed that no cross-talk (<–55 dB) is observed at the receiving ports B and C, as shown in Fig. 1.

Figure 4
Fig. 4 Eye diagrams before and after transmission in the 1-μm, C-, and L-wavebands without and with CDR.
shows the eye-diagrams obtained before and after transmission in the 1-μm, C-, and L-wavebands. After the transmission, eye-openings of the 9.953-Gbps PRBS (length: 215-1) signals can be observed in all the three wavebands without the CDR. Additionally, we also observed the clear eye-openings of the optical data transmission obtained using a photonic receiver with the CDR, as shown in Fig. 4. The dependencies of the BER on the received optical power in the 1-μm, C-, and L-wavebands are shown in Figs. 5(a)
Fig. 5 BERs vs. received power of (a) 1-μm, (b) C-, and (c) L-wavebands.
, 5(b), and 5(c), respectively. A BER of less than 10−9 was clearly observed when the PRBS optical data signal at 9.953 Gbps was transmitted over the 5.4-km-long HF in the 1-μm, C-, and L-wavebands. Power penalties between the 5.4-km-long transmission and the back-to-back (BtoB) are found to be 0.55 dB, 0.33 dB, and 0.66 dB in the 1-μm, C-, and L-wavebands respectively. From these results, simultaneous and error-free 10-Gbps photonic transmissions over the 5.4-km-long HF are successfully demonstrated in the 1-μm, C-, and L-wavebands by employing the ultra-broadband photonic transport system.

4. Conclusion

We developed and proposed the use of the ultra-broadband photonic transport system for expanding the usable bandwidth of the optical frequency resources for enhancing the data transmission capacity of future photonic network systems employing WDM. We also proposed the use of a 1-μm waveband in the photonic transport system since it is expected that the ultra-broadband optical frequency resources in the 1-μm waveband have the potential to realize new-generation photonic networks. Simultaneous 10-Gbps photonic transmissions in the 1-μm, C-, and L-wavebands were successfully demonstrated over a 5.4-km HF transmission line. Clear eye-openings were observed and error-free transmissions were also successfully achieved in the 1-μm, C-, and L-wavebands. Additionally, low cross-talk (<–55 dB) was observed between the 1-μm and the C- and L-wavebands. To construct future photonic network system, we believe that the demonstrated ultra-broadband photonic transport system using the HF transmission line will be a breakthrough in pioneering the use of optical frequency resources in the ultra-broadband.

Acknowledgments

We are highly grateful to Dr. K. Mukasa, Dr. K. Imamura, Dr. R. Miyabe, Dr. T. Yagi, and Dr. S. Ozawa of Furukawa Electric Co. for manufacturing the novel optical fibers. We also thank the staff of the Photonic Device Laboratory (PDL), Dr. I. Hosako, and Dr. Y. Matsushima of NICT.

References and links

1.

A. H. Gnauck, G. Charlet, P. Tran, P. Winzer, C. Doerr, J. Centanni, E. Burrows, T. Kawanishi, T. Sakamoto, and K. Higuma, “25.6-Tb/s C+L-Band Transmission of Polarization-Multiplexed RZ-DQPSK Signals,” in Proc. of OFC2007, Anaheim, CA, PDP19.

2.

N. Yamamoto and H. Sotobayashi, “All-band photonic transport system and its device,” Proc. SPIE 7235, 72350C (2009). [CrossRef]

3.

N. Yamamoto, H. Sotobayashi, K. Akahane, M. Tsuchiya, K. Takashima, and H. Yokoyama, “10-Gbps, 1-microm waveband photonic transmission with a harmonically mode-locked semiconductor laser,” Opt. Express 16(24), 19836–19843 (2008). [CrossRef] [PubMed]

4.

K. Kurokawa, K. Tsujikawa, K. Tajima, K. Nakajima, and I. Sankawa, “10 Gb/s WDM transmission at 1064 and 1550 nm over 24km PCF with negative power penalties,” Proc. of OECC2007, Yokohama, 12C1–3.

5.

R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, “Ytterbiumdoped fiber amplifiers,” IEEE J. Quantum Electron. 33(7), 1049–1056 (1997). [CrossRef]

6.

R. Katouf, N. Yamamoto, K. Akahane, T. Kawanishi, and H. Sotobayashi, “1-µm- band transmission by use of a wavelength tunable quantum-dot laser over a hole-assisted fiber,” Proc. SPIE 7234, 72340G (2009). [CrossRef]

7.

E. U. Rafailov, M. A. Cataluna, and W. Sibbett, “Mode-locked quantum-dot lasers,” Nat. Photonics 1(7), 395–401 (2007). [CrossRef]

8.

N.Yamamoto, R. Katouf, K. Akahane, T. Kawanishi, H. Sotobayashi, “1-μm waveband, 10Gbps transmission with a wavelength tunable single-mode selected quantum-dot optical frequency comb laser,” Proc. of OFC2009, San Diego, OWJ4. 6.

9.

N. Yamamoto, K. Akahane1, T. Kawanishi, R. Katouf, and H. Sotobayashi, “Quantum dot optical frequency comb laser with mode-selection technique for 1-μm waveband photonic transport system,” Jpn. J. Appl. Phys. (to be published).

10.

H. Hasegawa, Y. Oikawa, M. Yoshida, T. Hirooka, and M. Nakazawa, “10Gb/s transmission over 5 km at 850nm using single-mode photonic crystal fiber, single-mode VCSEL, and Si-APD,” IEICE Electron. Express 3(6), 109–114 (2006). [CrossRef]

11.

K. Mukasa, K. Imamura, R. Sugizaki, and T. Yagi, “Comparisons of merits on wideband transmission systems between using extremely improved solid SMFs with Aeff of 160mm2 and loss of 0.175dB/km and using large-Aeff holey fibers enabling transmission over 600nm bandwidth,” Proc. of OFC2008, San Diego, OThR1.

12.

K. Mukasa, R. Miyabe, K. Imamura, K. Aiso, R. Sugizaki, and T. Yagi, “Hole assisted fibers (HAFs) and holey fibers (HFs) for short-wavelength applications,” Proc. SPIE 6769, 67690J (2007).

13.

K. Saitoh and M. Koshiba, “Empirical relations for simple design of photonic crystal fibers,” Opt. Express 13(1), 267–274 (2005). [CrossRef] [PubMed]

14.

P. S. Henry, “Lightwave primer,” IEEE J. Quantum Electron. QE-21, 12 (1985).

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4510) Fiber optics and optical communications : Optical communications
(140.5960) Lasers and laser optics : Semiconductor lasers
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: January 4, 2010
Revised Manuscript: February 5, 2010
Manuscript Accepted: February 8, 2010
Published: February 22, 2010

Citation
Naokatsu Yamamoto, Yu Omigawa, Kouichi Akahane, Tetsuya Kawanishi, and Hideyuki Sotobayashi, "Simultaneous 3 × 10 Gbps optical data transmission in 1-μm, C-, and L-wavebands over a single holey fiber using an ultra-broadband photonic transport system," Opt. Express 18, 4695-4700 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-5-4695


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References

  1. A. H. Gnauck, G. Charlet, P. Tran, P. Winzer, C. Doerr, J. Centanni, E. Burrows, T. Kawanishi, T. Sakamoto, and K. Higuma, “25.6-Tb/s C+L-Band Transmission of Polarization-Multiplexed RZ-DQPSK Signals,” in Proc. of OFC2007, Anaheim, CA, PDP19.
  2. N. Yamamoto and H. Sotobayashi, “All-band photonic transport system and its device,” Proc. SPIE 7235, 72350C (2009). [CrossRef]
  3. N. Yamamoto, H. Sotobayashi, K. Akahane, M. Tsuchiya, K. Takashima, and H. Yokoyama, “10-Gbps, 1-microm waveband photonic transmission with a harmonically mode-locked semiconductor laser,” Opt. Express 16(24), 19836–19843 (2008). [CrossRef] [PubMed]
  4. K. Kurokawa, K. Tsujikawa, K. Tajima, K. Nakajima, and I. Sankawa, “10 Gb/s WDM transmission at 1064 and 1550 nm over 24km PCF with negative power penalties,” Proc. of OECC2007, Yokohama, 12C1–3.
  5. R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, “Ytterbiumdoped fiber amplifiers,” IEEE J. Quantum Electron. 33(7), 1049–1056 (1997). [CrossRef]
  6. R. Katouf, N. Yamamoto, K. Akahane, T. Kawanishi, and H. Sotobayashi, “1-µm- band transmission by use of a wavelength tunable quantum-dot laser over a hole-assisted fiber,” Proc. SPIE 7234, 72340G (2009). [CrossRef]
  7. E. U. Rafailov, M. A. Cataluna, and W. Sibbett, “Mode-locked quantum-dot lasers,” Nat. Photonics 1(7), 395–401 (2007). [CrossRef]
  8. N.Yamamoto, R. Katouf, K. Akahane, T. Kawanishi, H. Sotobayashi, “1-μm waveband, 10Gbps transmission with a wavelength tunable single-mode selected quantum-dot optical frequency comb laser,” Proc. of OFC2009, San Diego, OWJ4. 6.
  9. N. Yamamoto, K. Akahane1, T. Kawanishi, R. Katouf, and H. Sotobayashi, “Quantum dot optical frequency comb laser with mode-selection technique for 1-μm waveband photonic transport system,” Jpn. J. Appl. Phys. (to be published).
  10. H. Hasegawa, Y. Oikawa, M. Yoshida, T. Hirooka, and M. Nakazawa, “10Gb/s transmission over 5 km at 850nm using single-mode photonic crystal fiber, single-mode VCSEL, and Si-APD,” IEICE Electron. Express 3(6), 109–114 (2006). [CrossRef]
  11. K. Mukasa, K. Imamura, R. Sugizaki, and T. Yagi, “Comparisons of merits on wideband transmission systems between using extremely improved solid SMFs with Aeff of 160mm2 and loss of 0.175dB/km and using large-Aeff holey fibers enabling transmission over 600nm bandwidth,” Proc. of OFC2008, San Diego, OThR1.
  12. K. Mukasa, R. Miyabe, K. Imamura, K. Aiso, R. Sugizaki, and T. Yagi, “Hole assisted fibers (HAFs) and holey fibers (HFs) for short-wavelength applications,” Proc. SPIE 6769, 67690J (2007).
  13. K. Saitoh and M. Koshiba, “Empirical relations for simple design of photonic crystal fibers,” Opt. Express 13(1), 267–274 (2005). [CrossRef] [PubMed]
  14. P. S. Henry, “Lightwave primer,” IEEE J. Quantum Electron. QE-21, 12 (1985).

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