All-fiber widely tunable mode-locked thulium-doped laser using a curvature multimode interference filter

Li, N; Liu, M Y; Gao, Xinfeng; Zhang, L; Jia, Zhixu; Feng, Yang; Ohishi, Yasutake; Qin, Guanshi; Qin, Weiping

doi:10.1088/1612-2011/13/7/075103

Cited by 33 publications

(17 citation statements)

References 26 publications

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“…The filter is used to tune Er (Khattak et al 2018, Yuxin et al, 2018, Walbaum and Fallnich, 2011 , Yb (Zhang et al, 2012, Sánchez et al 2006, Selvas et al 2005, and Tm (X. , Li et al, 2016, Zhang et al, 2015 doped fiber laser due to that the cascade filter central wavelength can be modified to operate at any central wavelength. The tuning mechanism used in the mentioned systems either cumbersome or limited range.…”

Section: Introductionmentioning

confidence: 99%

Tunable optical fiber cascade filter by magneto-optical effect

Younus

Al-Dergazly

Abass

2021

Preprint

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Optical filters based on cascade single mode - multimode - single mode fiber structure (SMS) has considerable attention as a reliable optical device the reliability is due to its simplicity, compactness, low cost, all fiber device, low transmission loss, and can be continuously tune the laser wavelength at a specific spectral range. The principle of the operation is based on self- image and multimode interference (MMI) phenomena. A tunable filter was simulated based on cascade single mode-no core-single mode (SNS) fiber structure surrounded by magneto-optical fluid (MOF) using finite element method (FEM), the influence of the no core fiber (NCF) diameter and length on the tunablility and the bandwidth is investigated and optimized. Two materials were adopted as a MOF. The results show that the tunability of the filter can be improved by decreasing the NCF diameter. A continuous wavelength tunability about 37 nm from 1518 to 1555 nm with a bandwidth about 10 nm is obtained. The device is highly stable, inexpensive, provide wide tuning range compared with other tuning methods. This device can be used in optical communication, fiber sensor, spectroscopy, and in fiber laser technology. To the best of our knowledge, this is the first optical fiber MMI tunable filter by magnetic field effect.

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Section: Introductionmentioning

confidence: 99%

Tunable optical fiber cascade filter by magneto-optical effect

Younus

Al-Dergazly

Abass

2021

Preprint

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“…Similar to fiber lasers at 1 μm and 1.55 μm band, the realization of ultrashort and high energy pulses at 2 μm band is of great importance in the fields of material processing and free space transmission. Various classical and emerging mode-locked structures such as nonlinear polarization rotation components 7,8 , nonlinear amplifier loop mirrors 9,10 , multimode interference structures 11,12 actively mode-locking components 13 and two dimensional material saturable absorbers 14,15 can be used to generate 2 μm ultra-short pulses in thulium or holmium doped fiber lasers.…”

Section: Introductionmentioning

confidence: 99%

Observation and optimization of 2 μm mode-locked pulses in all-fiber net anomalous dispersion laser cavity

Ma¹,

Zhao²,

Liu³

et al. 2020

Opto-Electronic Advances

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We integrally demonstrate 2 μm mode-locked pulses performances in all-fiber net anomalous dispersion cavity. Stable mode-locking operations with the center wavelength around 1950-1980 nm can be achieved by using the nonlinear polarization rotation structure and properly designing the dispersion management component. Conventional soliton is firstly obtained with a total anomalous dispersion cavity. Due to the contribution of commercial ultra-high numerical aperture fibers, net dispersion is reduced to-0.077 ps 2. So that stretched pulse with 19.4 nm optical bandwidth is obtained and the de-chirped pulse-width can reach 312 fs using extra-cavity compression. Under pump power greater than 890 mW, stretched pulse can evolve into noise-like pulse with 41.3 nm bandwidth. The envelope and peak of such broadband pulse can be compressed with up to 2.2 ps and 145 fs, respectively. The single pulse energy of largely chirped stretched and noise-like pulse can reach 1.785 nJ and 1.53 nJ, respectively. Furthermore, extra-cavity compression can also contribute to a significant increase of peak power.

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“…Many reported tunable fiber lasers employing multimode interference (MMI) filters show excellent tuning capability and stability. P. Zhang et al reported a tunable multiwavelength Tm-doped fiber laser based on the multimode interference effect with tuning range over 24 nm [27]. Based on an MMI filter formed by a special no-core fiber, X. Ma et al reported an optofluidically tunable TDFL with a tuning range from 1813.52 to 1858.70 nm [20].…”

Section: Introductionmentioning

confidence: 99%

“…Based on an MMI filter formed by a special no-core fiber, X. Ma et al reported an optofluidically tunable TDFL with a tuning range from 1813.52 to 1858.70 nm [20]. By mechanically bending a homemade MMI fiber filter with a structure of single mode fiber (SMF)-multimode fiber (MMF)-SMF, a widely tunable mode-locked TDFL with a tuning range of 1919.6-2014.9 nm is achieved by N. Li and the co-workers [27].…”

Section: Introductionmentioning

confidence: 99%

Tunable 2 μm Fiber Laser Utilizing a Modified Sagnac Filter Incorporating Cascaded Polarization Maintaining Fibers

et al. 2020

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A widely tunable 2 μm fiber laser based on a modified Sagnac filter incorporating cascaded polarization maintaining fibers (PMF) is proposed and demonstrated. The modified Sagnac filter consists of two cascaded PMFs which have a 45°angle offset between their fast axes. Two polarization controllers (PCs) are inserted to optimize polarization status in the cavity. The lasing wavelength can be tuned by adjusting axial strain applied on PMFs. A tuning range of more than 40 nm is obtained with free tuning step, ranging from 1859 nm to 1901 nm. The proposed tunable laser is efficient to obtain precise wavelength tunability and wide tuning range.

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All-fiber widely tunable mode-locked thulium-doped laser using a curvature multimode interference filter

Cited by 33 publications

References 26 publications

Tunable optical fiber cascade filter by magneto-optical effect

Tunable optical fiber cascade filter by magneto-optical effect

Observation and optimization of 2 μm mode-locked pulses in all-fiber net anomalous dispersion laser cavity

Tunable 2 μm Fiber Laser Utilizing a Modified Sagnac Filter Incorporating Cascaded Polarization Maintaining Fibers

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