Abstract

We have designed a unique intracavity semiconductor optical amplifier (SOA) structure to suppress the relative intensity noise (RIN) for a fiber DFB laser. By exploiting the gain saturation effect of the SOA, a maximum noise suppression of 30 dB around the relaxation oscillation frequency is achieved, and the whole resonance relaxation oscillation peak completely disappears. Moreover, via a specially designed intracavity SOA structure, the optical intensity inside the SOA will be in a balanced state via the oscillation in the laser cavity, and the frequency noise of the laser will not be degraded with the SOA.

© 2016 Optical Society of America

Wideband ultra-low intensity noise reduction via joint action of gain saturation and out-of-phase polarization mixing effect from a semiconductor optical amplifier

Qilai Zhao, Wei Lin, Yuxin Sun, Chun Zeng, Changsheng Yang, Kaijun Zhou, Yu Zhang, Li Li, Zhouming Feng, Xiaoming Wei, Zhongmin Yang, and Shanhui Xu
Opt. Express 31(12) 18734-18750 (2023)

Frequency- and intensity-noise suppression in Yb³⁺-doped single-frequency fiber laser by a passive optical-feedback loop

Yubin Hou, Qian Zhang, and Pu Wang
Opt. Express 24(12) 12991-12999 (2016)

Simultaneous achievement of power boost and low-frequency intensity noise suppression in a bidirectional pumping fiber amplifier based on saturated even-distribution gain

Chun Zeng, Wenkun Peng, Qilai Zhao, Wei Lin, Changsheng Yang, Yuxin Sun, Changhe Wang, Zhouming Feng, Zhongmin Yang, and Shanhui Xu
Opt. Express 31(3) 5122-5130 (2023)

Broad-bandwidth near-shot-noise-limited intensity noise suppression of a single-frequency fiber laser

Qilai Zhao, Shanhui Xu, Kaijun Zhou, Changsheng Yang, Can Li, Zhouming Feng, Mingying Peng, Huaqiu Deng, and Zhongmin Yang
Opt. Lett. 41(7) 1333-1335 (2016)

10 W super-wideband ultra-low-intensity-noise single-frequency fiber laser at 1 µm

Yunxin Sun, Changhe Wang, Qilai Zhao, Changsheng Yang, Chun Zeng, Wei Lin, Zhouming Feng, Zhongmin Yang, and Shanhui Xu
Opt. Express 32(7) 11419-11428 (2024)