Multiwavelength Thulium-Doped Fiber Laser Using a Micro Fiber-Optic Fabry–Perot Interferometer

Abstract

A compact, all-fiberized multiwavelength thulium-doped fiber laser based on a micro fiber-optic Fabry-Perot interferometer (FPI) and a nonlinear optical loop mirror (NOLM) has been demonstrated. The FPI with a free spectral range of ∼26 nm was used as an effective wavelength selective filter, which was constructed by splicing a ∼71.4-μm long air-filled hollow-core fiber with single-mode fibers at both ends. An NOLM, served as an amplitude equalizer, was used for stabilizing multiwavelength laser operation. Besides switchable single-wavelength operations (

Wavelength-Switchable Single-Longitudinal- Mode Thulium-Doped Fiber Laser With Sampled Fiber Bragg Grating

“…To switch the wavelength, wavelength-selection and competitioninhibition mechanisms are needed. The wavelength can be selected with filters, such as the Mach-Zehnder interferometer [17] , cascaded Sagnac loop [18] , fiber-based Lyot filter [19] , micro fiber-optic Fabry-Perot interferometer [20] , few-mode fiber-based interferometer [21][22][23] and fiber Bragg grating (FBG) filters [7,24] . In particular, the FBG filter has been a good choice due to its simple structure, small size, and flexible tunability [25][26][27] .…”

Switchable Multi-Wavelength Thulium-Doped Fiber Laser Using Four-Mode Fiber Based Sagnac Loop Filter

“…To date, various comb filters such as two cascaded Sagnac loops [15], a Sagnac loop incorporating two-stage polarization maintaining fibers [16], a Sagnac loop combining a multimode interference filter [17], a micro-fiber-optic Fabry-Perot interferometer (FPI) [18], a non-adiabatic tapered fiber [19], and sampled fiber Bragg gratings [20] have been proposed for achieving 2-μm band multi-wavelength lasing output in TDFLs. Recently, the few-mode fiber has attracted much attention due to its many applications such as mode-division multiplex (MDM) transmission systems [21], tunable fiber lasers [22], and fiber sensors [23], [24].…”

Wavelength-Flexible Thulium-Doped Fiber Laser Based on Digital Micromirror Array

“…Thus, how to achieve high stability, narrow linewidth, and wavelength flexibility with rapid wavelength tuning or selection are the key to successful deployment for thulium-doped fibers lasers (TDFL). The current tuning devices include fiber Bragg grating (FBG) [9][10][11][12][13], F-P cavity [14][15][16], Sagnac fiber ring [17,18], Lyot filter [19][20][21], Mach-Zehnder interferometer [22][23][24], liquid crystal spatial light modulator [25], digital micromirror device (DMD) [26][27][28], and so on. Up to now, a DMD chip as a semiconductor-based addressable micromirror array has drawn considerable attention due to its flexible and fast filtering functionality in optical switching, interconnecting, and lasers.…”