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半导体超短光脉冲在长波长时分复用光纤通讯,超快数据处理,电光采样系统具有广泛应.常用的半导体短光脉冲产生方式有:增益开关技术、Q开关技术、锁模技术等.无论从理论上还是实践上,重复频率最高,宽度最窄的脉冲都是由锁模技术得到的.通过使用集成技术可以克服扩展腔结构中常见的机械稳定性不好,光路不易调整.而且存在复腔效应等缺点.在碰撞锁模激光器中,由于碰撞锁模效应和可饱和吸收体的吸收作用,脉冲前沿被吸收,后沿被光腔中的瞬间光栅散射,脉冲宽度得到大幅度削减.我们利用集成技术制备了1.5μm波长InGaAsP 碰撞脉冲锁模量子阱(CPM-QW)激光器(LD),测量得到脉宽5.1ps.
Semiconductor ultra-short light pulse in the long-wavelength time-division multiplexing optical fiber communication, ultra-fast data processing, electro-optical sampling system has a wide range of commonly used semiconductor short pulse generation methods are: gain switching technology, Q switch technology, clamping technology. Theoretically or practically, the pulse with the highest repetition frequency and the narrowest width is obtained by the mode-locked technique, which can overcome the common mechanical instability in the expansion cavity structure and make it difficult to adjust the optical path. Cavity effect, etc. In the collision mode-locked laser, the pulse front is absorbed due to the collision mode-locking effect and the saturable absorber, and the trailing edge is scattered by the instant grating in the optical cavity, the pulse width is greatly reduced. A 1.5μm wavelength InGaAsP impulse mode-locked quantum well (CPM-QW) laser (LD) was fabricated by using integrated technology. The measured pulse width was 5.1ps.