Zhang Sen, Meng Jianjun, Guo Shanli, Wang Lei, He Jian-Jun
State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou, China.
Opt Express. 2013 Jun 3;21(11):13564-71. doi: 10.1364/OE.21.013564.
We report simple and compact V-cavity semiconductor laser capable of full-band wavelength tuning. A half-wave coupler is used to obtain high side-mode suppression ratio (SMSR) without any grating or epitaxial regrowth. Temperature induced gain spectrum shift is employed in combination with the Vernier tuning mechanism to extend the wavelength tuning range beyond the free spectral range limit. Wavelength tuning of 50 channels at 100GHz spacing with SMSR up to 38 dB has been demonstrated. We show that with a temperature variation of 35°C, the tuning range can be extended by about 15 nm, in contrast to 0.1 nm/°C for thermo-optic tuning range in grating based lasers. At a fixed temperature, consecutive wavelength tuning of 31 channels was achieved. The response time of the channel switching under the current-tuning regime is measured to be about 20μs. The large tuning range that can cover the full C-band will enable such a simple, compact and potentially low-cost tunable laser to be used in wavelength-agile access and data center networks.
我们报道了一种能够进行全波段波长调谐的简单紧凑的V型腔半导体激光器。使用半波耦合器可在无需任何光栅或外延再生长的情况下获得高边模抑制比（SMSR）。温度诱导的增益谱偏移与游标调谐机制相结合，将波长调谐范围扩展到自由光谱范围极限之外。已证明可实现50个通道、间隔为100GHz、SMSR高达38dB的波长调谐。我们表明，与基于光栅的激光器中热光调谐范围为0.1nm/°C相比，在温度变化35°C时，调谐范围可扩展约15nm。在固定温度下，实现了31个通道的连续波长调谐。在电流调谐模式下，通道切换的响应时间测得约为20μs。能够覆盖整个C波段的大调谐范围将使这种简单、紧凑且潜在低成本的可调谐激光器可用于波长灵活的接入和数据中心网络。
