Multiwavelength fiber laser based on a high-birefringence fiber loop mirror

Abstract

In this letter, we propose a novel multiwavelength fiber laser based on fiber loop mirror formed by a highbirefringence fiber, a polarisation controller, and a 3 dB directional coupler. By setting the polarisation controller as half-waveplate, the fiber loop mirror acts as a polarisation-independent wavelength filter; Erbium-doped fiber (EDF) cooling by liquid nitrogen acts as gain medium. The wavelength spacing between the adjacent modes of the laser can be varied accurately by adjusting the length of the High-Birefringence (HiBi) fiber.

Switchable erbium-doped fiber laser using optical-injection controlling

“…In other words, it reduces the population inversion and the pump can no longer replenish the inversion for the lasing wavelength as fast as the injected light depletes it. Compared with most EDF lasers [15][16][17][18][19][20][21], its switching is much faster and more flexible. By applying such method, dual-wavelength switchable fiber laser has been achieved, corresponding to the change of the injected light power.…”

High power and compact switchable bismuth based multiwavelength fiber laser

“…SWFLs can be achieved by combining multiwavelength fibre lasers (MWFLs) with a wavelength selective filtering mechanism. MWFL systems have been demonstrated using photonic crystal fibres (PCFs) [1], Sagnac loop mirrors (SLMs) [2] and high birefringence (Hi-Bi) fibers [3,4] as well as utilizing non-linear effects such as stimulated Brillouin scattering (SBS) [5][6][7]. Fibre Bragg gratings (FBGs) used as a reflector in a cascade configuration [8] or FBGs written on birefringence fibres [9] for compactness have also become popular choices for generating multiwavelength outputs.…”

Multiwavelength erbium fiber ring laser using Sagnac loop and Fabry-Perot laser diode

“…With the development of fabrication technique of optical fiber grating, a number of all-fiber comb filters based on fiber gratings have been presented. They include sampled Bragg grating, highbirefringence fiber loop mirror, cascaded long period gratings wide-band chirped grating Fabry-Perot (FP) resonator and fiber Bragg grating Michelson interferometer [8][9][10][11][12][13]. For most of those that consist of grating pairs, two identical fiber gratings are demanded, otherwise undesired characteristics may happen.…”