scholarly journals Passively mode locked thulium and thulium/holmium doped fiber lasers using MXene Nb2C coated microfiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Ahmad ◽  
R. Ramli ◽  
N. N. Ismail ◽  
S. N. Aidit ◽  
N. Yusoff ◽  
...  
Keyword(s):  
Saturable Absorber ◽  
Fiber Lasers ◽  
Niobium Carbide ◽  
Laser Cavity ◽  
Mode Locking ◽  
Stable Mode ◽  
Nonlinear Properties ◽  
New Class ◽  
Photonics Devices

AbstractAs a result of the emergence of two-dimensional (2D) materials for various opto-electronics applications, a new class of materials named MXenes have been attracting interests due to their outstanding nonlinear properties. In this work, an MXene niobium carbide (Nb2C) was proposed and demonstrated as a saturable absorber to induce mode-locking in thulium- and thulium/holmium-doped fiber lasers. The Nb2C solution was first prepared using the liquid exfoliation technique, and then deposited onto a microfiber for integration into the laser cavity. Stable mode-locking operation was observed in both laser cavities, where the center wavelengths of the laser were recorded at 1944 nm for the TDFL and 1950 nm for the THDFL. The generated pulses in the TDFL and THDFL had repetition rates of 9.35 and 11.76 MHz respectively, while their corresponding pulse widths were 1.67 and 1.34 ps. Both of the lasers were highly stable, having SNR values of more than 52 dB and showed no major fluctuations when tested for their long-term stabilities. The results demonstrate an excellent performance of the Nb2C as a saturable absorber, offering opportunities to further explore MXenes for future photonics devices.

scholarly journals Passively Mode-Locked Thulium- and Thulium/Holmium-Doped Fiber Lasers Using MXene Nb2C-Coated Microfiber

2021 ◽  
Author(s):  
Harith Ahmad ◽  
Rizal Ramli ◽  
Nor Najwa Ismail ◽  
Siti Nabila Aidit ◽  
Norazriena Yusoff ◽  
...  
Keyword(s):  
Saturable Absorber ◽  
Fiber Lasers ◽  
Niobium Carbide ◽  
Laser Cavity ◽  
Mode Locking ◽  
Stable Mode ◽  
Nonlinear Properties ◽  
New Class ◽  
Photonics Devices

Abstract As a result of the emergence of two-dimensional (2D) materials for various opto-electronics applications, a new class of materials named MXenes have been attracting interests due to their outstanding nonlinear properties. In this work, an MXene niobium carbide (Nb2C) was proposed and demonstrated as a saturable absorber to induce mode-locking in thulium- and thulium/holmium-doped fiber lasers. The Nb2C solution was first prepared using the liquid exfoliation technique, and then deposited onto a microfiber for integration into the laser cavity. Stable mode-locking operation was observed in both laser cavities, where the center wavelengths of the laser were recorded at 1944 nm for the TDFL and 1950 nm for the THDFL. The generated pulses in the TDFL and THDFL had repetition rates of 9.35 and 11.76 MHz respectively, while their corresponding pulse widths were 1.67 and 1.34 ps. Both of the lasers were highly stable, having SNR values of more than 52 dB and showed no major fluctuations when tested for their long-term stabilities. The results demonstrate an excellent performance of the Nb2C as a saturable absorber, offering opportunities to further explore MXenes for future photonics devices.

scholarly journals Titanium Disulfide Based Saturable Absorber for Generating Passively Mode-Locked and Q-Switched Ultra-Fast Fiber Lasers

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1922
Author(s):  
Xinxin Shang ◽  
Linguang Guo ◽  
Huanian Zhang ◽  
Dengwang Li ◽  
Qingyang Yue
Keyword(s):  
Saturable Absorber ◽  
Fiber Lasers ◽  
Laser Cavity ◽  
Stable Mode ◽  
Titanium Disulfide ◽  
Maximum Pulse Energy ◽  
Fast Fiber ◽  
Absorption Performance ◽  
Er Doped ◽  
Photonics Devices

In our work, passively mode-locked and Q-switched Er-doped fiber lasers (EDFLs) based on titanium disulfide (TiS2) as a saturable absorber (SA) were generated successfully. Stable mode-locked pulses centred at 1531.69 nm with the minimum pulse width of 2.36 ps were obtained. By reducing the length of the laser cavity and optimizing the cavity loss, Q-switched operation with a maximum pulse energy of 67.2 nJ and a minimum pulse duration of 2.34 µs was also obtained. Its repetition rate monotonically increased from 13.17 kHz to 48.45 kHz with about a 35 kHz tuning range. Our experiment results fully indicate that TiS2 exhibits excellent nonlinear absorption performance and significant potential in acting as ultra-fast photonics devices.

Tin Telluride Quantum Dots as a Novel Saturable Absorber for Q‐Switching and Mode Locking in Fiber Lasers

2020 ◽  
pp. 2001821
Author(s):  
Safayet Ahmed ◽  
Junpeng Qiao ◽  
Ping Kwong Cheng ◽  
Ahmed Mortuza Saleque ◽  
Mohammad Ismail Hossain ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Saturable Absorber ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Tin Telluride ◽  
Q Switching

Towards an optimum saturable absorber for the multi-gigahertz harmonic mode locking of fiber lasers

2019 ◽  
Vol 7 (9) ◽  
pp. 1094 ◽  
Author(s):  
Jakub Bogusławski ◽  
Grzegorz Soboń ◽  
Rafał Zybała ◽  
Jarosław Sotor
Keyword(s):  
Saturable Absorber ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Harmonic Mode

scholarly journals Two-micron all-fiberized passively mode-locked fiber lasers with high-energy nanosecond pulse

2020 ◽  
Vol 8 ◽  
Author(s):  
Meng Wang ◽  
Yijian Huang ◽  
Zongpeng Song ◽  
Jincheng Wei ◽  
Jihong Pei ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Pulse Duration ◽  
Output Power ◽  
Saturable Absorber ◽  
Pulse Energy ◽  
Fiber Lasers ◽  
Maximum Output Power ◽  
High Energy ◽  
Maximum Output ◽  
Stable Mode

We report on mode-locked thulium-doped fiber lasers with high-energy nanosecond pulses, relying on the transmission in a semiconductor saturable absorber (SESA) and a carbon nanotube (CNTs-PVA) film separately. A section of an SMF–MMF–SMF structure multimode interferometer with a transmission peak wavelength of ∼2003 nm was used as a wavelength selector to fix the laser wavelength. When the SESA acted as a saturable absorber (SA), the mode-locked fiber laser had a maximum output power of ∼461 mW with a pulse energy of ∼0.14 μJ and a pulse duration of ∼9.14 ns. In a CNT-film-based mode-locked fiber laser, stable mode-locked pulses with the maximum output power of ∼46 mW, pulse energy of ∼26.8 nJ and pulse duration of ∼9.3 ns were obtained. To the best of our knowledge, our experiments demonstrated the first 2 μm region ‘real’ SA-based dissipative soliton resonance with the highest mode-locked pulse energy from a ‘real’ SA-based all-fiberized resonator.

Graphene oxide-COOH as a new saturable absorber for both Q-switching and mode-locking fiber lasers

2017 ◽  
Vol 15 (10) ◽  
pp. 101402 ◽  
Author(s):  
Fengyan Zhao Fengyan Zhao ◽  
Yishan Wang Yishan Wang ◽  
Yonggang Wang Yonggang Wang ◽  
Hushan Wang Hushan Wang ◽  
Yajun Cai Yajun Cai
Keyword(s):  
Graphene Oxide ◽  
Saturable Absorber ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Q Switching

Carbon Nanomaterials Based Saturable Absorbers for Ultrafast Passive Mode-Locking of Fiber Lasers

2020 ◽  
Vol 16 (3) ◽  
pp. 441-457
Author(s):  
Chih-Hsien Cheng ◽  
Gong-Ru Lin
Keyword(s):  
Saturable Absorber ◽  
Fiber Lasers ◽  
Carbon Nanomaterials ◽  
Modulation Depth ◽  
Optical Nonlinearity ◽  
Mode Locking ◽  
Industrial Applications ◽  
Passive Mode ◽  
Saturable Absorbers ◽  
Saturation Intensity

This paper emphasizes on overviewing the developing progress of the state-of-the-art carbon nanomaterial-based saturable absorbers for passively mode-locked fiber lasers, including carbon nanotube (CNT), graphene, graphite and other carbon nanomaterials. With reviewing the performances of these proposed candidates, the characteristic parameters required for initiating and stabilizing the passive mode-locked fiber lasers are summarized for comparison and discussion. At first, the basic characteristics such as saturation intensity and self-amplitude-modulation (SAM) coefficients of the CNT material with different-wall types are discussed in detail. In comparison, the single-wall CNT possesses optical nonlinearity better than double-wall CNT, whereas the doublewall CNT exhibits wavelength tenability and the multi-wall CNT fails to initiate mode-locking. Subsequently, different graphene saturable absorbers with slightly changing their optical properties made by various fabrication technologies are introduced to take over the role of typical CNT saturable absorber. The detailed analyses on graphene saturable absorber for developing various types of passively mode-locked fiber lasers are overviewed. At last, other new-aspect graphite and carbon nanomaterials related saturable absorbers have emerged because they reveal similar optical nonlinearity with graphene but exhibit cost-effectiveness and easy-production. When changing saturable absorber from graphene to other carbon nanomaterials, the modulation depth is decreased but the saturation intensity is concurrently enlarged because of the disordered structure with increased interlayer spacing and reduced graphene content. At the current stage, selecting carbon nanomaterials with high nonlinear absorbance and low saturated intensity for large SAM coefficient is the golden rule for passively mode-locked the fiber lasers in future academic and industrial applications.

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