Chen Gaoting

Sampled FBG based optical interleaver

In this text, we propose a novel optical interleaver using sampled fiber Bragg grating. According to coupling-mode theory, the interleaver based on sampled fiber Bragg grating with low sampling duty cycle may realize separate odd and even channel into two groups with power equalization, low insertion loss, and low dispersion.

All-fiber Q-switched erbium laser using a fiber Bragg grating placed in loop mirror as a wavelength-selective intensity modulator

Summary form only given. We have demonstrated, for the first time to our knowledge, operation of a novel Q-switched erbium doped fiber laser using a fiber Bragg grating placed in loop mirror (FBGLM) as an all-fiber wavelength-selective intensity modulator. The main advantage of this FBGLM modulator is that it provides not only the ability to adjust the reflectivity of the cavity mirror but also the ability of wavelength selection. Stable optical pulse output with 3 dB linewidth of 0.07 nm, pulse width of 1.0 /spl mu/s, and peak power of 1.267 W at 80 mW pump power and 8 KHz repetition frequency was obtained in experiments.

Experimental study of the wavelength locked of the high power laser diode bar

An external cavity laser diode was built by using a high power laser diode bar (LDB, 10% duty cycle, 100 A current), collimated column Len for fast axis beam collimation and a volume Bragg grating (VBG) as a feedback element to get LDBs wavelength locked to the Bragg wavelength of the VBG.