Q-switched mode locking of a fiber laser resonantly pumped Er:YAG ceramic laser at 1645 nm using graphene as saturable absorber

Abstract

A fiber laser resonantly pumped Q-switched mode locked Er:YAG ceramic 1645 nm laser using graphene as the saturable absorber is realized. The mode-locked pulses with average output power of 320 mW, Q-switching envelope temporal width of 10 µs and mode-locking repetition rate of 83 MHz can readily be generated from the laser. To the best of our knowledge, this is the first report on the graphene-based Q-switching mode locked Er:YAG ceramic laser emitting around 1645 nm.

Stable Q-switched mode-locking of Er:YAG ceramic laser at 1645 nm using a semiconductor saturable absorber

“…[12][13][14] Modelocking phenomenon at 1.6 μm has been observed within Q-switched envelopes from Er:YAG laser modulated using graphene absorber. 15) Semiconductor saturable absorber mirrors (SESAM) are attractive passive devices in terms of simplicity, compactness and more importantly, bandgapengineerable according to the requirements of specific systems. In this letter, we report on realization of stable QML operation of an Er:YAG ceramic laser at 1645 nm using a SESAM and pumped with a high brightness, linearly polarized 1532 nm fiber laser.…”

Stable continuous-wave mode-locked laser from a 1645 nm Er:YAG ceramic oscillator

“…In 2015, H. T. Huang et al inserted graphene into the Er:YAG ceramic laser cavity as the modulation device, and obtained the first Q-switched mode-locking state with a full width at half maximum of 10 μs. 10) In 2016, Q. Ye et al reported for the first time a single-frequency Q-switched Er:YAG polycrystalline ceramic laser, with a pulse width of 250 ns. 19) In 2019, the pulse widths of single-frequency Q-switched pulses obtained by M. Zhang are 93.2 ns with a double Er:YAG ceramic ring cavity pumped at both ends.…”