Wide Temperature Range 0 < T < 85 °C Narrow Linewidth Discrete Mode Laser Diodes for Coherent Communications Applications

Optical Injection Locking: From Principle to Applications

“…Using OIL, low cost lasers with relatively large linewidth can be turned into high performance narrow linewidth lasers. Fig.5 shows an experimental example we carried out using a 5 kHz fiber laser master to OIL a 1.2 MHz linewidth discrete mode semiconductor slave laser [48]. The laser linewidth was measured using a selfheterodyne setup with an 80 km standard single mode fiber (SMF-28) delay line [49].…”

Advances in narrow linewidth diode lasers

“…The laser wavelength was 780 nm, and the spectral linewidth was only 2 MHz. On this basis, Ireland Brana Optoelectronics Company and Dublin City University [39] jointly developed separated mode semiconductor lasers that with a wide operating temperature range. The laser line width is less than 250 kHz, the SMRR is ∼40 dB, and the output power is about 4 mW.…”

Advances in narrow linewidth diode lasers

“…2011 年, 爱尔兰布拉纳光电公司联合瑞士纽夏特大学 [38] 提出一种分离模式半导体激光器, 通过 在脊形波导上刻蚀多个深槽引入折射率微扰, 进而增强一个 F-P 模式, 损耗其他模式, 获得单纵模激 光输出, 实现激光波长 780 nm, 光谱线宽仅为 2 MHz. 在此基础上, 爱尔兰布拉纳光电公司和都柏 林城市大学 (Dublin City University) [39] 联合研制出一种宽工作温区的分离模式半导体激光器, 实现 在 0 • C < T < 85 • C 温度范围内保持单纵模工作, 激光线宽 < 250 kHz, SMSR 达 40 dB, 输出功率约 4 mW. 2018 年, 该公司 [40] 又报道了一种单片集成单模红光半导体激光器, 采用分离模式结构实现激 光波长 689 nm, 激光功率 10 mW, SMSR…”