Noise-sidebands-free and ultra-low-RIN 1.5  μm single-frequency fiber laser towards coherent optical detection

Qilai Zhao; Zhitao Zhang; Bo Wu; Tianyi Tan; Changsheng Yang; Jiulin Gan; Huihui Cheng; Zhouming Feng; Mingying Peng; Zhongmin Yang; Shanhui Xu

doi:doi:10.1364/PRJ.6.000326

Photonics Research, 2018, 6 (4): 04000326, Published Online: Aug. 1, 2018

Noise-sidebands-free and ultra-low-RIN 1.5 μm single-frequency fiber laser towards coherent optical detection

Qilai Zhao ¹Zhitao Zhang ¹Bo Wu ²Tianyi Tan ¹Changsheng Yang ^1,3Jiulin Gan ¹Huihui Cheng ¹Zhouming Feng ¹Mingying Peng ¹Zhongmin Yang ^1,4,5Shanhui Xu ^1,3,*

Author Affiliations

¹ State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China

² College of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China

³ Guangdong Engineering Technology Research and Development Center of High-Performance Fiber Laser Techniques and Equipments, Zhuhai 519031, China

⁴ Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangzhou 510640, China

⁵ Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510640, China

Figures & Tables

Fig. 1. Experimental setup in different structures (a) with BOA without SIL, (b) with SIL without BOA, and (c) with BOA and SIL. FBG, fiber Bragg grating; PM-NB-FBG, PM narrow-band FBG; BB-FBG, broadband FBG; LD, laser diode; PM-WDM, PM wavelength division multiplexer; PM-CIR, PM circulator; PMI, PM isolator; PM-BPF, PM bandpass filter; PMTI, PM tap isolator; VOA, variable optical attenuator.

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Fig. 2. RIN spectra of this single-frequency fiber laser with different conditions. The quantum noise limit of −152.9 dB/Hz is also shown for comparison. (a) 0 to 5 MHz. (b) 0 to 50 MHz.

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Fig. 3. Measured signals of coherent light detection of this single-frequency fiber laser in different statuses.

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Fig. 4. (a) Optical spectra of this fiber laser at different output ports. The inset shows the degree of polarization of the final laser output (red dot) represented by a Poincaré sphere. (b) Measured single-longitudinal-mode characteristic of the final laser output.

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Fig. 5. (a) Measured self-heterodyne spectra of this fiber laser with different conditions. (b) Measured frequency noise spectra and estimation line for evaluation of linewidth.

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Qilai Zhao, Zhitao Zhang, Bo Wu, Tianyi Tan, Changsheng Yang, Jiulin Gan, Huihui Cheng, Zhouming Feng, Mingying Peng, Zhongmin Yang, Shanhui Xu. Noise-sidebands-free and ultra-low-RIN 1.5 μm single-frequency fiber laser towards coherent optical detection[J]. Photonics Research, 2018, 6(4): 04000326.

Noise-sidebands-free and ultra-low-RIN 1.5 μm single-frequency fiber laser towards coherent optical detection

Fig. 2. RIN spectra of this single-frequency fiber laser with different conditions. The quantum noise limit of −152.9 dB/Hz is also shown for comparison. (a) 0 to 5 MHz. (b) 0 to 50 MHz.

Fig. 3. Measured signals of coherent light detection of this single-frequency fiber laser in different statuses.

Fig. 4. (a) Optical spectra of this fiber laser at different output ports. The inset shows the degree of polarization of the final laser output (red dot) represented by a Poincaré sphere. (b) Measured single-longitudinal-mode characteristic of the final laser output.

Fig. 5. (a) Measured self-heterodyne spectra of this fiber laser with different conditions. (b) Measured frequency noise spectra and estimation line for evaluation of linewidth.

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Noise-sidebands-free and ultra-low-RIN 1.5 μm single-frequency fiber laser towards coherent optical detection

Fig. 2. RIN spectra of this single-frequency fiber laser with different conditions. The quantum noise limit of −152.9 dB/Hz is also shown for comparison. (a) 0 to 5 MHz. (b) 0 to 50 MHz.

Fig. 3. Measured signals of coherent light detection of this single-frequency fiber laser in different statuses.

Fig. 4. (a) Optical spectra of this fiber laser at different output ports. The inset shows the degree of polarization of the final laser output (red dot) represented by a Poincaré sphere. (b) Measured single-longitudinal-mode characteristic of the final laser output.

Fig. 5. (a) Measured self-heterodyne spectra of this fiber laser with different conditions. (b) Measured frequency noise spectra and estimation line for evaluation of linewidth.

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