互注入锁定产生双波长可调谐光脉冲的实验研究

报道了两个增益开关调制的法布里-珀罗半导体激光器互注入锁定实验方案，可产生双波长可调谐光脉冲。该装置对两个结构基本相同的法布里珀罗半导体激光器做增益开关调制，产生多模光脉冲输出；然后利用两个光纤光栅作为滤波元件，通过调节可调谐光延迟线(VODL2)，可使得双波长光脉冲在两个法布里-珀罗激光器之间相互注入锁定．从而在输出端得到高边模抑制比的双波长光脉冲输出。然后再通过应力作用在两个光纤光栅上以改变它们的反射波长和适当调整另一个可调谐光延迟线(VODLI)长度．可得到不同的双波长的光脉冲输出，而重复频率保持524．6MHz不变。在13．2nm调谐范围内边模抑制比高于25dB．系统稳定且波长调节方便。

Tunable Dual-Wavelength Optical Short Pulse Generation in a Mutual Pulse Injection-SEEDING Scheme

A mutual pulse injection-seeding scheme is developed to generate tunable dual-wavelength optical short pulses by the use of two gain-switched Fabry-Pérot (F-P) semiconductor lasers. Multimode optical short output pulse is first generated by gain switching two F-P lasers with the approximate setup; Then by using two fiber Bragg gratings (FBGs) as filters, mutual injection locking of two wavelength optical pulses between two F-P lasers is realized by tuning optical delay line (VODL2), and dual-wavelength optical short pulse with high side mode suppression ratio is obtained at the output end. Wavelength selection and tuning are achieved by adjusting two FBGs and another optical delay line (VODL1), while a constant repetition frequency of 524.6 MHz is maintained. The side mode suppression ratio of the output pulses is better than 25 dB at a wavelength-tuning range of 13.2 nm. The system is stable and convenient for wavelength tuning.