A5041418529- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Solid State Laser Technologies
- Photonic and Optical Devices
- Optical Coherence Tomography Applications
- Spectroscopy and Laser Applications
- Nonlinear Optical Materials Studies
- Luminescence and Fluorescent Materials
- Laser Design and Applications
- Nonlinear Optical Materials Research
- Optical Network Technologies
- Diamond and Carbon-based Materials Research
- Photoacoustic and Ultrasonic Imaging
- Mechanical and Optical Resonators
- Advanced Fiber Optic Sensors
Hong Kong Polytechnic University
2022-2024
Shenzhen Polytechnic
2022-2023
Shenzhen University
2018-2020
Abstract Crystalline porous metal–organic frameworks (MOFs) with nanometer‐sized void spaces, large surface areas and ordered reticular motifs have offered a platform for achieving disruptive successes in divisional fields. Great progress exploring the linear nonlinear optical features of MOFs has been achieved, yet third‐order nonlinearities two‐dimensional (2D) rarely studied. Here, broadband amplitude modification phase shift are demonstrated few‐layer nickel‐ p ‐benzenedicarboxylic acid...
Abstract In recent years, MXene has become a hotspot because of its good conductivity, strong broadband absorption, and tunable band gap. this contribution, 0D Ti 3 C 2 T x quantum dots are synthesized by liquid exfoliation method wideband nonlinear optical response from 800 to 1550 nm is studied, which have larger absorption coefficient β –(11.24 ± 0.14) × 10 –2 cm GW –1 . The carrier dynamic processes explored with ultrahigh time resolution nondegenerate transient (TA) spectroscopy,...
Low threshold ultrafast fiber lasers in 1.5 based NbSe<sub>2</sub> quantum dots saturable absorbers have been successfully fabricated and investigated.
Mode-locked ultrashort-pulse lasers are obtained by using direct bandgap GaTe quantum dots as a new saturable absorber. The pulse duration is 115 fs.
Two-dimensional (2D) materials, such as graphene, transition metal dichalcogenides (TMDs), topological insulators and black phosphorus, have been widely used in the generation of ultrafast pulsed lasers due to their strong photo-material interactions excellent saturable absorption characteristics. In this work, we investigated optical characteristics few-layer Ti <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> CT...
The statistical dynamics of partially incoherent ultrafast lasers are complex and chaotic, which is significant for fundamental research practical applications. We experimentally theoretically reveal the spectral evolutions correlations in an noise-like rectangle pulse laser (NLRPL). Based on histogram analysis, probability distribution asymmetry intensity fluctuation decayed with wavelength far away from peak due to detection noise. full-spectral correlation values indicate that similarity...
MXene, as a novel two-dimensional (2D) material saturable absorber (SA), has excellent nonlinear optical characteristics and strong photo-materials interactions.
Continuous interest in bidirectional ultrafast fiber lasers not only reinforces the practical applications coherent dual-comb spectroscopy but also enriches understanding of soliton dynamics nonlinear systems. However, transient solitons are still unexplored. Here, we report on an observation switching a net-anomalous-dispersion laser which can operate both asynchronous and synchronous operations. Transient between states demonstrated, is accompanied by switchable weak interaction solitons....
In our works, germanium monosulfide (GeS) was employed as a saturable absorber for obtaining passively mode locked fiber laser. Unlike two-dimensional transition metal dichalcogenides, we report the nonlinear optical properties of GeS and its application novel absorbers in generating mode-locked lasers. At present, reports this 2D material applied to ultrafast lasers are rare. By inserting laser cavity, obtained pulse duration 854 femtosecond 560 picosecond output erbium-doped...
The double-pass configuration of the erbium-doped ZBLAN fiber amplifier is achieved for first time. amplification efficiency ~40% higher than that single-pass amplifier, which significant compact mid-infrared amplifiers.
In this work, an all-fiber passively Q-switched Er-doped fiber laser(EDFL) is firstly demonstrated by using NbSe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> quantum dot as a saturable absorber(SA), to the best of our knowledge. A stable laser at 1533 nm achieved threshold pump power 42 mW inserting -SA into EDFL cavity. By increasing gradually from 192 mW, pulse duration decreases 5.12 2.53 μs and single energy increase 35.07 98.19...
We demonstrate a flat broadband time-stretched swept source based on extra-cavity spectral shaping. By adjusting the polarization-dependent gain profile and driving current of booster optical amplifier (BOA), shaping is optimized to generate output with 1-dB bandwidth ∼100 nm, 3-dB ∼140 nm power ∼21.4 mW. The short-term long-term stabilities are characterized. average cross correlation 183,485 round trips 0.9997 standard deviation 2×10-5, indicating high single-shot similarity coherence....
We propose a synchronized time lens based temporal magnifier for the characterization of an ultrafast pulse, which is assisted by phase lock loop (PLL) to actively repetition rates pump laser and signal laser. A feedback control system combining proportional-integral (PI) circuit piezoelectric transducer (PZT) inside cavity used synchronize between lights. Benefitting from PLL technique, position pulse remains as numerical aperture system, therefore it has high short-time stability...
The Fourier domain mode locked (FDML) laser finds applications in fiber Bragg grating (FBG) interrogation and optical coherence tomography (OCT) systems [1]. center wavelength of FDML is important many applications. C-band (1530–1565 nm) often used FGB because the availability components at low cost. Swept sources with central wavelengths 1300, 1060, or 800 nm are also OCT owing to water absorption loss these wavelengths. lasers E-band however have not yet been demonstrated. refers band...