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

Chen, Xiao; Dai, Dezheng; Zhang, Yi; Wu, Hongyuan; Gao, Yunshu; Chen, Genxiang; Wang, Yiquan

doi:10.3390/mi11121036

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…The TDFL with switchable output is extensively used in optical fiber sensing and wavelength routing networks due to its flexible lasing performance. To obtain a switchable output, the wavelength selective component, including an acousto-optic tunable bandpass filter [19], digital micromirror array [20], Fabry-Perot (F-P) filter [21], Sagnac loop mirror [22], Mach-Zehnder interferometer [23], mode interference-based filter [24], tapered fiber [25] and fiber Bragg grating (FBG) [26], should be used. As a result of their good compatibility, narrow bandwidth, simple structure and small size, FBGs are widely used in TDFLs to obtain a switchable output.…”

Section: Introductionmentioning

confidence: 99%

Twelve-Wavelength-Switchable Thulium-Doped Fiber Laser With a Multimode Fiber Bragg Grating

et al. 2021

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In this article, a precisely controlled, switchable thulium-doped fiber laser (TDFL) with high optical signal-to-noise ratio (OSNR) is proposed and demonstrated. A home-made multimode fiber Bragg grating (MMFBG) with multireflection peaks was used as an optical filter to select the desired lasing channel. Using a manually controlled fusion splicer, the axial misalignment was applied between the single mode fiber and the MMFBG to switch the output wavelength. In the experiment, the number of switchable lasing lines was up to 12, and the fluctuation of the center wavelength and output power was less than 0.03 nm and 0.67 dB, respectively. A maximum slope efficiency of 1.3% was obtained when the axial misalignment was 0 μm, and the OSNR was higher than 65 dB. In addition, the proposed fiber laser was used as an optical fiber laser sensor to quantify the strain applied on the MMFBG, and a sensitivity of 1.16 pm/με was obtained.

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Section: Introductionmentioning

confidence: 99%

Twelve-Wavelength-Switchable Thulium-Doped Fiber Laser With a Multimode Fiber Bragg Grating

et al. 2021

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“…However, a broad range of wavelength tuneability is generally implemented using special laser components. Typically, these are bulk elements, such as acousto-optic tunable filters 12,13 , diffraction gratings 14,15 , volume Bragg gratings 16 , or planar semiconductor chips 17,18 , which benefits come at the cost of generation stability and substantial insertion losses. Thus, the possibilities of shaping and manipulating the laser generation through the interplay of intrinsic intracavity phenomena have recently become a topic of intensive experimental and theoretical investigation [19][20][21] .…”

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confidence: 99%

Gain-controlled Broadband Tuneability in Self-Mode-locked Thulium-doped Fibre Laser Through Variable Feedback

Kirsch

Bednyakova

Cadier³

et al. 2022

Preprint

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Broadband wavelength tuneability can ensure a new level of versatility for laser systems and extend areas of their applications. Principle limitations of achieving wide tuning wavelength ranges are generally defined by the spectral bandwidth of the gain and traditional tuneability techniques, relying on electrically controlled or bulk filters, reducing laser efficiency and generation stability. In this work, we present nearly 90 nm tuneability in ultrafast Tm-doped fibre laser within the span from 1873 to 1962 nm by implementing variable feedback for efficient control of the excitation level of the active medium and, hence, the gain spectrum. The highest laser efficiency is observed with 20% feedback, while 25% feedback enabled achieving the highest output energy of 1 nJ in 600-fs soliton pulses at 1877 nm central wavelength. By combining the nonlinear Schrödinger equation and population inversion rate equations for the gain medium, the developed numerical model helps to unveil nonlinear pulse evolution under the influence of dynamically varying gain spectrum. The resulting laser system presents a compact and straightforward approach to achieve laser generation with a broad range tuneability of wavelength and operation regimes, which is not impaired by the limitations on laser stability or power performance and can be translated to other wavelength ranges.

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Thulium-doped fiber laser with switchable single-wavelength output using polarization-dependent loss

Guan

Yan²,

Qin³

et al. 2023

Front. Phys.

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A thulium-doped fiber laser (TDFL) with switchable single-wavelength output was proposed and experimentally constructed, and its output characteristics were investigated. The central wavelengths were 1940.52 nm and 2048.04 nm, defined by a superimposed uniform fiber Bragg grating (SI-UFBG) with reflectivity larger than 92%. Switchable output was successfully achieved by using polarization-dependent loss, with the help of a drop-in polarization controller and an in-line polarizer. For both output wavelengths, optical signal-to-noise ratios larger than 80 dB were achieved. Maximum fluctuations of the central wavelengths of 1940.52 nm and 2048.02 nm under 60 min were, respectively, 0.04 nm and 0.01 nm. Maximum fluctuations of output power for the same wavelengths over the same time period were, respectively, 1.09 dB and 0.12 dB. Maximum output powers of 215.12 mW and 155.53 mW were achieved for the respective output wavelengths of 1940.52 nm and 2048.02 nm. Moreover, a tuning range of ∼2 nm was realized by enforcing a strain on the SI-UFBG. The proposed TDFL may be applied in laser medicine and free-space-related applications.

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

Cited by 4 publications

References 30 publications

Twelve-Wavelength-Switchable Thulium-Doped Fiber Laser With a Multimode Fiber Bragg Grating

Twelve-Wavelength-Switchable Thulium-Doped Fiber Laser With a Multimode Fiber Bragg Grating

Gain-controlled Broadband Tuneability in Self-Mode-locked Thulium-doped Fibre Laser Through Variable Feedback

Thulium-doped fiber laser with switchable single-wavelength output using polarization-dependent loss

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