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Noise reduction of tunable laser based on mutual injection-locked reflective semiconductor optical amplifiers |
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| Authors: | H-D Ku C-S Park |
| Institution: | 1. Department of Information and Communication Engineering, Sungkyul University, 53 Sungkyuldaehakro, Manan-Gu, Anyang-city, Gyeonggi-Do, Republic of Korea;2. School of Information and Communications, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-Gu, Gwangju, Republic of Korea |
| Abstract: | A tunable laser source based on mutual injection-locked reflective semiconductor optical amplifiers (MIL-RSOAs) using a tunable bandpass filter was investigated to reduce relative-intensity noise (RIN) and improve the carrier-to-noise ratio (CNR) without additional optoelectronic compensation. Compared with laser based on self-injection-locked RSOAs (SIL-RSOAs), the laser based on MIL-RSOAs reduced RIN by as much as 16 dB and improved CNR by as much as 20 dB. The proposed method improved sensitivity for 1.25 Gb/s transmission by >15 dB compared with using traditional laser based on SIL-RSOAs. |
| Keywords: | Optical fiber laser Gain-saturated RSOA Mutual injection locking RIN reduction CNR improvement |
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