Wavelength tunable optical short pulse generation by self-seeding of a gain-switched Fabry-Perot laser diode with extended wavelength-tuning range

摘要

Wavelength tunable optical short pulse generation by the use of a gain-switched Fabry-Perot laser diode in a simple self-seeding scheme is presented. The laser external cavity consists of a tunable filter, two circulators and an erbiumdoped fiber amplifier, which provides a wavelength selective and intensity controllable feedback to the laser diode. Sidemode suppression ratio of the output pulses obtained is close to or larger than 30 dB over a relatively wide wavelength-tuning range of 30 nm.