Black phosphorus flakes covered microfiber for Q-switched ytterbium-doped fiber laser

Abstract

We demonstrate a passively Q-switched ytterbium-doped fiber laser based on black phosphorus (BP) flakes covered microfiber. The BP saturable absorber is fabricated by sandwiching a microfiber between two pieces of polydimethylsiloxane supported BP flakes film, which is prepared by the mechanical exfoliation method. In this case the BP flakes can be well protected from the action of air and moisture. By incorporating BP flakes covered microfiber into a ytterbium-doped ring fiber laser, stable and reliable Q-switched operation at 1064 nm can be realized via interaction between few-layers BP flakes and the evanescent field of the laser. The laser allows Q-switched pulse generation with a repetition rate in the range of 26-76 kHz and a pulse duration in the range of 5.5-2.0 μs, by varying the pump power from 38 mW to 100 mW.

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

“…These early efforts have promoted the rapid development of layered materials in Q‐switched lasers. For example, Q‐switched fiber lasers based on layered materials including graphene, topological insulators, TMDCs, and BP, have been obtained, as illustrated in Table . It can be seen that these lasers have excellent performance in output power, pulse width, repetition frequency, and peak power, which is not inferior to the traditional lasers based on semiconductor saturable absorption mirrors and carbon nanotubes.…”

Recent Progress of Two-Dimensional Materials for Ultrafast Photonics

“…In 2017, Huang et al achieved a Q-switched laser at 1064 nm where microfibers were sandwiched by BP flakes to integrate SA, providing an effective way to prolong the life of BP flakes by isolating them from the air [ 297 ]. In 2019, Wang et al demonstrated both Q-switched and mode-locked lasers based on BP by inserting polarization-maintaining fiber Bragg gratings [ 298 ].…”

Ultra-stable pulse generation in ytterbium-doped fiber laser based on black phosphorus

“…Since the rst BP-based SA (BP-SA) deposited around a microber was proposed, 15 there has been much progress in the eld of BP-based pulse laser generation. [16][17][18][19][20][21] BP-SA can be manufactured via liquid phase exfoliation technology 14 or the mechanical exfoliation method. 22 Zhang et al reported few-layer selenium-doped black phosphorus with high quality and low cost in 2017.…”