Wavelength-switchable 9.5 GHz graphene mode-locked waveguide laser

Abstract

A multi-wavelength compact ultrafast laser based on a single-mode waveguide inscribed in Nd:YAG and graphene saturable absorber is developed. By changing the pump parameters, we demonstrate single-, dual-and multi-wavelength mode-locking regimes. Accurate control of intracavity losses provides stable CW passive mode-locking at a wavelength of 1064 nm and dual-wavelength mode-locking at 1061 and 1064 nm with a pulse repetition rate of 9.5 GHz.

Fast dual-comb spectroscopy based on a dual-wavelength all-fiber ring laser with high repetition rate

“…© 2023 The Japan Society of Applied Physics approximately 10 fs nm −1 , close to the limit value in a previous study, 23) ensuring asynchronous pulse generation with a high repetition rate.…”

“…Dual-comb lasers with high or ultrahigh repetition rates and/or high repetition rate differences can be achieved in solid-state lasers, 22) waveguide lasers, 23) and electro-optic fiber lasers. 24) As an alternative, passively mode-locked fiber lasers provide benefits such as low cost, small size and simple structure.…”

Intracavity losses effect on mode-locking in a waveguide laser with graphene saturable absorber

“…Besides, graphene can be deposited directly onto the optical element without increasing the size of the waveguide laser. Therefore, the combination of waveguide technology with two-dimensional graphene-based saturable absorber appears to be a universal approach for development of miniature GHz repetition rate ultrafast laser [21,22].…”

All polarization-maintain fiber mode-locked laser based on nonlinear polarization evolution

“…table passively mode-locked fiber lasers have wide applications in nonlinear optics, spectroscopy, optical sensing, material precision processing, and optical communication. [1][2][3][4][5][6][7][8][9] Thus various methods generating modelocked pulse in fiber lasers have been widely studied in the last decades, such as two-dimensional materials (graphene, carbon nanotube, and so on), [10][11][12][13][14] semiconductor saturable absorber (SESAM), 15,16) and Kerr nonlinearity, particularly nonlinear optical loop mirror (NOLM), 17,18) nonlinear amplifying loop mirror (NALM), 19,20) and nonlinear polarization evolution (NPE). 21,22) However, two-dimensional materials and SESAM cannot be applied to achieve high energy and high peak power pulses owing to the low damage threshold.…”