Switchable Dual-Wavelength Mode-Locking of Thulium-Doped Fiber Laser Based on SWNTs

Jiang, Kai; Wu, Zhichao; Fu, Songnian; Song, Jue; Li, Huizi; Tang, Ming; Shum, Perry Ping; Liu, Deming

doi:10.1109/lpt.2016.2580604

Cited by 13 publications

(7 citation statements)

References 22 publications

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“…Because of their potential to broaden the channel capacity of communication systems, the development of multi-wavelength lasers near the 2-μm waveband has attracted particular research attention [4][5][6]. Using thulium-doped fiber as a gain medium, a laser can be excited in the 2-μm band with a higher self-focusing threshold and lower nonlinear effect than in the nearinfrared band [7,8]. Such a laser poses little risk to the eyes and finds applications in various fields, including laser radar, laser communication, and environmental remote sensing [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Switchable Multi-Wavelength Thulium-Doped Fiber Laser Using a Cascaded or Two-Segment Sagnac Loop Filter

Feng

Cheng

et al. 2022

IEEE Access

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A switchable multi-wavelength thulium-doped fiber laser (TDFL) using either two-stage cascaded or two-segment Sagnac loop filters are proposed and analyzed. Both filters incorporate a 3-m and 1.7-m long polarization-maintaining fiber, which acts as a comb filter. By adjusting two polarization controllers, when the TDFL used a cascaded Sagnac loop filter, eight stable single-wavelength operations were obtained with easy switching among them. The wavelength range was 16.36 nm during the singlewavelength switchable operation, with the optical signal-to-noise ratio up to 55 dB. This TDFL can achieve at most quintuple-wavelength operation. When the TDFL used a two-segment Sagnac loop filter, we achieved single-wavelength and dual-wavelength switchable. This TDFL can achieve at most stable quadruple-wavelength operation. In dual-wavelength switchable operation, the maximum and minimum wavelength spacings were 21.78 nm and 1.50 nm. Due to its abundant range of wavelengths, the proposed TDFLs has great potential in wavelength-division multiplexing.INDEX TERMS Multi-wavelength thulium-doped fiber laser, wavelength switchable, cascaded Sagnac loop filter, two-segment Sagnac loop filter.

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Section: Introductionmentioning

confidence: 99%

Switchable Multi-Wavelength Thulium-Doped Fiber Laser Using a Cascaded or Two-Segment Sagnac Loop Filter

Feng

Cheng

et al. 2022

IEEE Access

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“…[1] At present, passively mode-locked TDFLs incorporating an artificial or real saturable absorber (SA) have been primarily used as novel laser sources. [2][3][4][5][6][7][8][9][10][11] Among these mode-locking techniques, nonlinear polarization rotation (NPR) [2] and nonlinear amplification loop mirror (NALM) [3] mode-locking have the characteristic of a high damage threshold but are extremely sensitive to environmental fluctuations. Usually, such drawbacks are not desirable in applications of medical treatment and scientific research.…”

Section: Introductionmentioning

confidence: 99%

“…Usually, such drawbacks are not desirable in applications of medical treatment and scientific research. Recently, graphene, [4][5][6][7] carbon nanotubes (CNTs), [8] transition metal dichalcogenides (TMDs), [9] topological insulators (TIs), [10] and black phosphorus [11] are being considered as a kind of potential SA for passively mode-locked TDFL. Among them, graphene has become the focus of attention from many researchers because of its many features including low saturable absorption threshold, controlled modulation depth, ultrafast recovery time (100 fs-200 fs), wide spectrum range (300 nm-2500 nm), and easy integration with optical system, which make it stand out in all kinds of mode-locking materials.…”

Section: Introductionmentioning

confidence: 99%

Generation and evolution of multiple operation states in passively mode-locked thulium-doped fiber laser by using a graphene-covered-microfiber

Wang¹,

Zhang²,

Peng³

et al. 2018

Chinese Phys. B

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Using graphene-covered-microfiber (GCM) as a saturable absorber, the generation and evolution of multiple operation states are proposed and demonstrated in passively mode-locked thulium-doped fiber laser. The microfiber was fabricated using the flame brushing method to an interaction length of ∼ 1.2 cm with a waist diameter of ∼ 10 µm. Graphene layers were grown on copper foils by chemical vapor deposition and transferred onto the polydimethylsiloxane (PDMS) to form a PDMS/graphene film, which allowed light-graphene interaction via evanescent field. With the increase of the pump power from 1.25 W to 2.15 W, five different lasing regimes, including continuous-wave, conventional soliton mode-locking, multisoliton mode-locking, a period of transition, and noise-like mode-locking, were achieved in a fiber ring cavity. To the best of our knowledge, it is the first report of the generation and evolution of multiple operation states by covering graphene on the microfiber in the 2-µm region. The results demonstrate that GCM can be a promising method for fabricating all fiber SA, and the switchable operation states can provide more portability in complex application domain.

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“…Different passively mode locking methods have been explored to generate ultra-short pulses, such as nonlinear polarization rotation technique, [1] semiconductor saturable absorber mirrors, [2,3] single-wall carbon nanotubes, [4] grapheme, [5] and nonlinear optical loop mirrors (NOLMs), [6][7][8] which act as the saturable absorber. He et al presented a laser-diode-pumped passively mode-locked femtosecond disordered crystal laser by using Nd: CaGdAlO 4 (Nd:CGA) as the gain medium.…”

Section: Introductionmentioning

confidence: 99%

“…[19] Jiang et al demonstrated the switchable dual-wavelength mode locking of thulium-doped fiber laser based on SWNTs. [20] Liu et al reported a passively Q-switched Yb:LSO laser based on a tungsten disulphide (WS 2 ) saturable absorber operating at 1034 nm and 1056 nm simultaneously. [21] Bound state solitons in nonlinear optical fiber systems have been reported theoretically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

Observation of stable bound soliton with dual-wavelength in a passively mode-locked Er-doped fiber laser

et al. 2017

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A phase-locked bound state soliton with dual-wavelength is observed experimentally in a passively mode-locked Erdoped fiber (EDF) laser with a fiber loop mirror (FLM). The pulse duration of the soliton is 15 ps and the peak-to-peak separation is 125 ps. The repetition rate of the pulse sequence is 3.47 MHz. The output power is 11.8 mW at the pump power of 128 mW, corresponding to the pulse energy of 1.52 nJ. The FLM with a polarization controller can produce a comb spectrum, which acts as a filter. By adjusting the polarization controller or varying the pump power, the central wavelength of the comb spectrum can be tuned. When it combines with the reflective spectrum of the fiber Bragg grating, the total spectrum of the cavity can be cleaved into two parts, then the bound state soliton with dual-wavelength at 1549.7 nm and 1550.4 nm is obtained.

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Switchable Dual-Wavelength Mode-Locking of Thulium-Doped Fiber Laser Based on SWNTs

Cited by 13 publications

References 22 publications

Switchable Multi-Wavelength Thulium-Doped Fiber Laser Using a Cascaded or Two-Segment Sagnac Loop Filter

Switchable Multi-Wavelength Thulium-Doped Fiber Laser Using a Cascaded or Two-Segment Sagnac Loop Filter

Generation and evolution of multiple operation states in passively mode-locked thulium-doped fiber laser by using a graphene-covered-microfiber

Observation of stable bound soliton with dual-wavelength in a passively mode-locked Er-doped fiber laser

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