Switchable and compact dual-wavelength random fiber laser based on random Bragg grating array

Lv, Bing; Zhang, Wentao; Huang, Wenzhu; Li, Fang

doi:10.1016/j.yofte.2022.102858

Cited by 8 publications

(5 citation statements)

References 40 publications

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“…EDF has been utilized in RFLs for providing active gain in the 1.5 μm band with long-distance SMF [41,144,145] or random fiber grating [146][147][148][149][150][151][152] as feedback mediums. Besides, random fiber lasing can be directly generated in a short piece of EDF as well.…”

Section: Erfls and Eyrfls With Lasing Wavelength At 15 μM Bandmentioning

confidence: 99%

“…[57,168] However, the wavelength channel number and the spacing of the FBG-based multi-wavelength RFLs are hard to change. Hence, fiber interferometry, such as Fabry-Perot interferometer, [147] Mach-Zehnder interferometer, [184] and Sagnac interferometry, [185][186][187] could be a better option for multiwavelength random fiber lasing generation. For example, the SMF-MMF-SMF-constructed multimode interference filter was added to the reflector of an RRFL to generate cascaded multiwavelength lasing emission.…”

Section: Multi-wavelength Rfls Based On Incorporated Optical Filter C...mentioning

confidence: 99%

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Spectral Manipulations of Random Fiber Lasers: Principles, Characteristics, and Applications

Han,

Cheng,

Tao

et al. 2024

Laser & Photonics Reviews

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Random fiber lasers (RFLs), a new variety of random lasers, have become a vigorous research spot over the past decades. RFLs possess superiorities in efficiency, structural flexibility, directionality, cost, etc. Particularly, RFLs are discovered to be good platforms for the construction of various forms of high‐performance lasers. Herein, recent progress in the spectral manipulation of RFLs and the applications of spectral‐tailored RFLs are reviewed. Both theoretical and experimental investigations of the unique spectral properties of RFLs up to now are presented. The superior wavelength flexibility of RFLs which can achieve any desired lasing wavelength in the 1–2.1 µm band is highlighted. Via spectral manipulation, RFLs have shown the capability of high‐spectral‐purity, narrow‐bandwidth, and multi‐wavelength output. Furthermore, the RFLs featuring unique spectral properties can lead to various promising applications, which are concisely summarized, including optical fiber communication, optical fiber sensing, imaging, supercontinuum generation, nonlinear‐frequency conversion, mid‐infrared lasing pump sources, and laser‐driven inertial confinement fusion motivation. The challenges and prospects for RFLs are also discussed.

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Section: Erfls and Eyrfls With Lasing Wavelength At 15 μM Bandmentioning

confidence: 99%

Section: Multi-wavelength Rfls Based On Incorporated Optical Filter C...mentioning

confidence: 99%

Spectral Manipulations of Random Fiber Lasers: Principles, Characteristics, and Applications

Han,

Cheng,

Tao

et al. 2024

Laser & Photonics Reviews

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“…Compared with backward RS inside SMF, a random weak grating array (RWGA) can provide strong random feedback, so that RWGA-based RFLs have superior performances, such as a narrow linewidth, compact structure, and high optical signal-to-noise ratio (OSNR) [ 10 , 11 ]. Differing from the feedback mechanism of backward RS, RWGA has wavelength dependence and can strongly improve random feedback efficiency by introducing refractive index modulation, which results in a low lasing threshold combining with the high-efficiency gain provided by erbium-doped fiber (EDF) [ 6 , 12 , 13 , 14 ]. RWGA can be regarded as the superposition of many Fabry–Perot interferometers which introduced by weak FBGs.…”

Section: Introductionmentioning

confidence: 99%

“…Various spectral filter techniques and components are introduced to half-open-cavity RFLs for further compressing the linewidth, improving stability, and reducing the frequency noise of RFL. For example, FBG filters [ 15 , 16 ], FPI filters [ 12 ], long period fiber grating [ 17 ], Phase-shifted fiber Bragg grating (π-FBG) [ 18 ] and commercial bandpass filters [ 19 ] have been demonstrated to further compress the bandwidth of the lasing spectrum for a single-wavelength operation and improve the wavelength and power stability. The above schemes show that proper optical filters matched to the wavelength of RWGA, with a flatter response, low insert loss, and narrow bandwidth, can contribute to further compress the linewidth and suppress the frequency noise of RFL.…”

Section: Introductionmentioning

confidence: 99%

Narrow Linewidth Half-Open-Cavity Random Laser Assisted by a Three-Grating Ring Resonator for Strain Detection

Zhang

Huang

et al. 2022

Sensors

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A stabilized narrow-linewidth random fiber laser for strain detection, based on a three-grating ring (TGR) resonator and half-open-cavity structure, is proposed and investigated experimentally. The half-open-cavity structure proved to provide double optical gain of erbium-doped fiber, which was beneficial to increase the photon lifetime as well as further narrow the linewidth. Meanwhile, the stability and frequency noise of narrow lasing output was improved by suppressing the competition-induced undesired residual random lasing modes with the TGR resonator. The TGR resonator is composed of a double-cavity fiber Bragg grating Fabry–Perot (FBG-FP) interferometer, a section of single-mode fiber, and a circulator. The specially designed double-cavity FBG-FP interferometer embedded in the TGR resonator acted as the strain-sensing element and improved the resolution of the dynamic strain. A stable ultra-narrow linewidth of about 205 Hz was obtained. The frequency noise was reduced to about 2 Hz/√Hz. A high dynamic strain measuring resolution of 35 femto-strain (fε)/√Hz was achieved.

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“…For instance, recently, a dual-wavelength fiber laser, based on an fs-laser direct-write random Bragg grating array, which showed the properties of the fs written reflector, has been reported [16]. That laser improved power stability over that of previous dualwavelength single mode Er-doped fiber-based lasers [17].…”

Section: Introductionmentioning

confidence: 99%

A Dual-Wavelength Fiber Laser Sensor with Temperature and Strain Discrimination

Sanchez-Gonzalez

Pérez-Herrera

Roldán-Varona

et al. 2022

Sensors

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This work presents a dual-wavelength C-band erbium-doped fiber laser assisted by an artificial backscatter reflector. This fiber-based reflector, inscribed by femtosecond laser direct writing, was fabricated into a single mode fiber with a length of 32 mm. The dual-wavelength laser obtained, centered at 1527.7 nm and 1530.81 nm, showed an optical signal-to-noise ratio over 46 dB when pumped at 150 mW. Another feature of this laser was that the power difference between the two channels was just 0.02 dB, regardless of the pump power, resulting in a dual emission laser with high equalization. On the other hand, an output power level and a central wavelength instability as low as 0.3 dB and 0.01 nm were measured, in this order for both channels. Moreover, the threshold pump power was 40 mW. Finally, the performance of this dual-wavelength fiber laser enhanced with a random reflector for sensing applications was studied, achieving the simultaneous measurement of strain and temperature with sensitivities around 1 pm/με and 9.29 pm/°C, respectively.

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Switchable and compact dual-wavelength random fiber laser based on random Bragg grating array

Cited by 8 publications

References 40 publications

Spectral Manipulations of Random Fiber Lasers: Principles, Characteristics, and Applications

Spectral Manipulations of Random Fiber Lasers: Principles, Characteristics, and Applications

Narrow Linewidth Half-Open-Cavity Random Laser Assisted by a Three-Grating Ring Resonator for Strain Detection

A Dual-Wavelength Fiber Laser Sensor with Temperature and Strain Discrimination

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