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Photonics Research

Photonics Research

| A joint OSA/Chinese Laser Press publication

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Articles 1 to 11 of 11

April


Optimization of spectral distortion in ytterbium-doped mode-locked fiber laser system

  • Yang Liu, Zhenao Bai, Zhongwei Fan, Xiaohui Li, and Qijie Wang
  • received 01/06/2015; accepted 04/13/2015; posted 04/17/2015; Doc. ID 231524
  • [full text: PDF (1215) KB)]
  • Abstract: A valid method for optimizing the spectral distortion of ultrafast pulse in polarization-maintaining picosecond linear cavity fiber laser with one stage fiber amplifier is proposed. The mechanism of spectral distortion in the fiber system has been investigated. The experimental and theoretical results have been illustrated that filtering effect of fiber Bragg grating could effectively decrease the spectral oscillatory distortion accumulated by self-phase modulation. Injected into the Nd:YAG regenerative amplifier, the ultrafast pulse could produce high pulse energy of 1.2 mJ at repetition rate of 1 kHz.

Keywords (OCIS):

  • (140.0140) Lasers and laser optics : Lasers and laser optics
  • (140.4050) Lasers and laser optics : Mode-locked lasers
  • (060.3735) Fiber optics and optical communications : Fiber Bragg gratings

Absorption through a coupled optical resonance in a horizontal InP nanowire array

  • Nicklas Anttu and Ali Hosseinnia
  • received 03/12/2015; accepted 04/09/2015; posted 04/09/2015; Doc. ID 236106
  • [full text: PDF (1176) KB)]
  • Abstract: We study through electromagnetic modeling the absorption of light of a given wavelength in an array of horizontal InP nanowires of diameter less than 100 nm. Such absorption is performed most efficiently by using polarized light and by exciting a coupled optical resonance in a sparse array. In that case, we excite a resonance in the individual nanowires and couple the resonances in neighboring nanowires through a lattice resonance of the periodic array. At such a resonance, an array with nanowires of 80 nm in diameter can absorb more than 8 times stronger than a tight-packed array, despite containing a 7 times smaller amount of the absorbing InP material.

Keywords (OCIS):

  • (300.1030) Spectroscopy : Absorption
  • (350.4238) Other areas of optics : Nanophotonics and photonic crystals
  • (310.6628) Thin films : Subwavelength structures, nanostructures

Graphene oxide paper as a saturable absorber for Er- and Tm-doped fiber lasers

  • Jakub Boguslawski, Jaroslaw Sotor, Grzegorz Sobon, Rafal Kozinski, Krzysztof Librant, Magdalena Aksienionek, Ludwika Lipinska, and Krzysztof Abramski
  • received 01/06/2015; accepted 04/09/2015; posted 04/15/2015; Doc. ID 231568
  • [full text: PDF (822) KB)]
  • Abstract: In this work pulse generation in both 1.5 μm and 2 μm spectral ranges using a graphene oxide (GO) paper based saturable absorber (SA) in Er- and Tm-doped fiber lasers is presented. The article describes the fabrication method of GO paper and its characterization. The performance of both lasers is discussed in detail. Stable, mode-locked operation provides 613 fs and 1.36 ps soliton pulses centered at 1565.9 nm and 1961.6 nm in Er- and Tm-doped fiber lasers, respectively. Furthermore, scaling of spectral width, and hence the pulse duration, by increasing the number of GO paper layers in the Er-doped laser is described. The versatility and simplicity of GO paper fabrication combined with the possibility of scaling the optical spectrum full width at half-maximum are essential features which make it a good candidate for ultrafast low-power mode-locked lasers operating in different spectral regions.

Keywords (OCIS):

  • (140.3510) Lasers and laser optics : Lasers, fiber
  • (140.4050) Lasers and laser optics : Mode-locked lasers
  • (160.4330) Materials : Nonlinear optical materials
  • (160.4236) Materials : Nanomaterials
  • (060.3510) Fiber optics and optical communications : Lasers, fiber

73 nJ、109 fs Yb-doped fiber laser at 19 MHz repetition rate in amplifier similariton regime

  • Yizhou Liu, Yifan Cui, Jian Zhang, Aimin Wang, and Zhigang Zhang
  • received 01/20/2015; accepted 04/02/2015; posted 04/15/2015; Doc. ID 232649
  • [full text: PDF (473) KB)]
  • Abstract: We report femtosecond pulse generation in an amplifier similariton oscillator and a pre-chirped fiber amplifier system. The final output power is 1.4 W fundamental repetition rate is 19.1 MHz after a single state fiber amplifier. The pulse width is 109fs.

Keywords (OCIS):

  • (140.3510) Lasers and laser optics : Lasers, fiber
  • (140.4480) Lasers and laser optics : Optical amplifiers
  • (320.7090) Ultrafast optics : Ultrafast lasers

March


Simultaneous evaluation of two branches of a multi-functional integrated optic chip with an ultra-simple dual-channel configuration

  • Jun Yang, Yonggui Yuan, Chuang Li, Ai Zhou, Shuai Liang, Zhangjun Yu, Bing Wu, Feng Peng, Yu Zhang, Zhihai Liu, and Libo Yuan
  • received 03/20/2015; accepted 03/24/2015; posted 04/07/2015; Doc. ID 236376
  • [full text: PDF (661) KB)]
  • Abstract: We propose an ultra-simple dual-channel configuration for simultaneously evaluating two branches of a multi-functional integrated optic chip (MFIOC). In the configuration, the MFIOC is employed as a beam splitter to construct the demodulation interferometer together with a 2×2 fiber coupler. Interference happens between polarization modes travelling through different channels of the MFIOC. The cross-couplings of each channel are respectively characterized by the interference peaks which distribute on opposite sides of the central interference peak. Temperature responses of the MFIOC are experimentally measured from -40 ºC to 80 ºC. Results show that the proposed configuration can achieve simultaneous dual-channel transient measurements with resolution of -90 dB and dynamic range of 90 dB. In addition, the two channels of the configuration have consistent measuring performance and the two branches of the MFIOC have different responses to temperature variation.

Keywords (OCIS):

  • (120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
  • (120.3180) Instrumentation, measurement, and metrology : Interferometry
  • (120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation

Normal, degenerated, and anomalous-dispersion-like Cerenkov sum-frequency generation in one nonlinear medium

  • Xianfeng Chen, Ning An, Yuanlin Zheng, Huaijin Ren, Xiaohui Zhao, and Xuewei Deng
  • received 01/15/2015; accepted 03/23/2015; posted 04/02/2015; Doc. ID 231669
  • [full text: PDF (714) KB)]
  • Abstract: We report on the experimental realization of Cerenkov sum-frequency generation across the material dispersion in a one-dimension periodically poled ferroelectric crystal. Three schemes of sum-frequency generation, confined only in the vicinity of domain walls and in the form of nonlinear Cerenkov radiation, are demonstrated in normal, degenerated and anomalous-dispersion-like configuration. We exploit their phase-matching geometries, which exhibit a whole scenario of the evolution of Cerenkov radiation varying with the dispersion relationship among the interaction waves. In addition, two sets of conical sum-frequency generation with different radius and center are demonstrated, which resulting from scattering-assistant phase-matching processes.

Keywords (OCIS):

  • (190.0190) Nonlinear optics : Nonlinear optics
  • (190.7220) Nonlinear optics : Upconversion
  • (290.0290) Scattering : Scattering

Direct detection of transient super-resolution effect of nonlinear saturation absorption thin films

  • J. S Wei and Xinghao Zhang
  • received 03/03/2015; accepted 03/16/2015; posted 03/25/2015; Doc. ID 235443
  • [full text: PDF (712) KB)]
  • Abstract: Using strong nonlinear saturation absorption effect to break through the diffraction limit is an alternative technique. In this technique, formation of a dynamic and reversible optical pinhole channel and tranient super-resolution is critical. In this work, a pump-probe transient detection and observation-experimental setup is constructed to explore the formation process directly. Ge2Sb2Te5 thin film with strong nonlinear saturation absorption is investigated. The dynamic evolution of the optical pinhole channel is detected and imaged, and the transient super-resolution spot is directly captured experimentally. Results verify that the super-resolution effect originates from generation of an optical pinhole channel and that the formation of the optical pinhole channel is dynamic and reversible. A good method is provided for direct detection and observation of the transient process of the super-resolution effect of nonlinear thin films.

Keywords (OCIS):

  • (190.4360) Nonlinear optics : Nonlinear optics, devices
  • (210.0210) Optical data storage : Optical data storage

Growth of large area atomically thin MoS2 film via ambient pressure chemical vapour deposition

  • Qiaoliang Bao, Caiyun Chen, Hong Qiao, Jingchao Song, Shaojuan Li, Yao Lu, Wenzhi Yu, and Yunzhou Xue
  • received 01/12/2015; accepted 03/08/2015; posted 03/11/2015; Doc. ID 232329
  • [full text: PDF (2207) KB)]
  • Abstract: Atomically thin MoS2 films have attracted significant attention due to excellent electrical and optical properties. The development of device applications demands the production of large area thin film which is still an obstacle. Here we developed a facile method to directly grow large area MoS2 thin film on SiO2 substrate via ambient pressure chemical vapor deposition method. The characterizations by spectroscopy and electron microscopy reveal that the as-grown MoS2 film is mainly bilayer and trilayer with high quality. Back gate field-effect transistor based on such MoS2 thin film shows carrier mobility up to 3.4 cm2 V-1 s-1 and on/off ratio of 105. The large area atomically thin MoS2 prepared in this study has the potential for wide optoelectronic and photonic device applications.

Keywords (OCIS):

  • (250.0250) Optoelectronics : Optoelectronics
  • (310.3840) Thin films : Materials and process characterization
  • (310.6860) Thin films : Thin films, optical properties
  • (180.5655) Microscopy : Raman microscopy
  • (310.6188) Thin films : Spectral properties
  • (310.6845) Thin films : Thin film devices and applications

(PBTD) The CVD-grown few-layer MoS2 as a broadband Q-switcher for erbium-doped fiber lasers

  • HE-PING LI, Handing Xia, Changyong Lan, Chun Li, Jinbo Du, Shang Jian Zhang, and Yong Liu
  • received 01/06/2015; accepted 03/05/2015; posted 03/06/2015; Doc. ID 231615
  • [full text: PDF (489) KB)]
  • Abstract: We report an erbium-doped fiber laser (EDFL) passively Q-switched by a few-layer molybdenum disulfide (MoS2) saturable absorber (SA). The few-layer MoS2 is grown by the chemical vapor deposition (CVD) method and transferred onto the end face of a fiber connector to form a fiber-compatible MoS2 SA. The laser cavity is constructed by using a three-port optical circulator and a fiber Bragg grating (FBG) as the two end mirrors. Stable Q-switched pulses are obtained with a pulse duration of 1.92 μs at 1560.5 nm. By increasing the pump power from 42 to 204 mW, the pulse repetition rate can be widely changed from 28.6 to 114.8 kHz. Passive Q-switching operations with discrete lasing wavelengths ranging from 1529.8 to 1570.1 nm are also investigated by using FBGs with different central wavelengths. This study demonstrates that few-layer MoS2 can serve as a promising broadband SA for Q-switching laser operation.

Keywords (OCIS):

  • (140.3500) Lasers and laser optics : Lasers, erbium
  • (140.3540) Lasers and laser optics : Lasers, Q-switched
  • (190.4400) Nonlinear optics : Nonlinear optics, materials

(PBTD)Ethanol catalytic deposition of MoS₂ on tapered fiber

  • hao wang, Xiaoyan Zhang, sheng liu, Bangqi Zhu, Bohua Chen, Jun Wang, Kan Wu, and Jianping Chen
  • received 01/06/2015; accepted 03/04/2015; posted 03/06/2015; Doc. ID 231621
  • [full text: PDF (995) KB)]
  • Abstract: Deposition of two-dimensional (2D) MoS₂ materials on the tapered fiber allows various photonic applications including saturable absorber and four-wave mixing. Ethanol catalytic deposition (ECD) of MoS₂ on the optical tapered fiber was proposed and demonstrated in this work. Different from the conventional optical driven deposition using water or organic solvent, ECD method utilized the high volatility of the ethanol solvent which significantly increased the movement speed of the MoS₂ nanosheets and thus boosted the deposition rate and reduced the minimum power threshold to drive the deposition. We believe ECD method should be able to be applied to other similar 2D materials such as other types of transition metal chalcogenides.

Keywords (OCIS):

  • (160.4330) Materials : Nonlinear optical materials
  • (190.4360) Nonlinear optics : Nonlinear optics, devices
  • (310.1860) Thin films : Deposition and fabrication

(PBTD)Passively Q-switched tri-wavelength Yb3+:GdAl3(BO3)4 solid-state laser with topological insulator Bi2Te3 as saturable absorber

  • yijian sun, Chao-Kuei Lee, Chaoyang Tu, Jinglong Xu, Ye Wang, Houping Xia, Zhaojie Zhu, you zhenyu, and Shufang Gao
  • received 01/06/2015; accepted 03/04/2015; posted 03/06/2015; Doc. ID 231768
  • [full text: PDF (862) KB)]
  • Abstract: In this paper, we reported a multi-wavelength passively Q-switched Yb3+:GdAl3(BO3)4 solid state laser with topological insulator Bi2Te3 as saturable absorber for the first time. Bi2Te3 nanosheets were prepared by the facile solvothermal method. The influence of three Bi2Te3 densities on the laser operation was compared. The maximum average output power was up to 57mW with a pulse energy of 511.7nJ. The shortest pulse width was measured to be 370 ns with110 kHz pulse repetition rate and 40 mW average power. The laser operated at three wavelengths simultaneously at 1043.7, 1045.3, and 1046.2 nm, of which the frequency differences were within terahertz wave band. Our work suggests that that solvothermal synthesized Bi2Te3 is a promising saturable absorber for simultaneously multi-wavelength laser operation.

Keywords (OCIS):

  • (140.3480) Lasers and laser optics : Lasers, diode-pumped
  • (140.3540) Lasers and laser optics : Lasers, Q-switched
  • (140.3580) Lasers and laser optics : Lasers, solid-state
  • (140.3615) Lasers and laser optics : Lasers, ytterbium

Articles 1 to 11 of 11





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