Yuanjun Zhu

We propose and demonstrate a novel dynamically tunable fiber-based Lyot filter for the realization of a dual-wavelength mode-locked fiber laser, operating at center wavelengths of 1535 nm and 1564 nm. The same laser cavity can also be operated in a single-wavelength mode-locked regime with a wavelength tuning range of 30 nm, from 1532 nm to 1562 nm. The proposed dynamically tunable Lyot-filter provides a simple setup for laser mode-locking using a single laser cavity design to generate dual-wave

We propose and demonstrate for the first time, to the best of our knowledge, a thermally controlled all polarization-maintaining (PM) fiber Lyot filter. This filter is implemented in an all-PM mode-locked fiber laser to achieve wavelength tunability. When operating in the single-wavelength tunable mode, the center wavelength can be tuned across a range from 1546 nm to 1571 nm. Furthermore, the laser can also operate in a dual-wavelength mode with center wavelengths at 1545 nm and 1571 nm. The te

Multi-wavelength fiber lasers have emerged as a promising light source for the application in wavelength division multiplexing communication, terahertz wave generation and optical sensing due to high efficiency and robustness. Lyot-filter emerges as a potential device for multi-wavelength generation application. However, because of the high birefringence of polarization maintaining fiber in Lyot-filter, it is difficult to generate broadband dual-wavelength or multi-wavelength mode-locked fiber l

Multi-wavelength fiber lasers have emerged as a promising light source for the application in wavelength division multiplexing communication, terahertz wave generation and optical sensing due to high efficiency and robustness. Lyot-filter emerges as a potential device for multi-wavelength generation application. However, because of the high birefringence of polarization maintaining fiber in Lyot-filter, it is difficult to generate broadband dual-wavelength or multi-wavelength mode-locked fiber l

The influence of laser temporal parameters on the laser-induced damage threshold (LIDT) is particularly complex due to the variation and uncertainty in damage mechanisms associated with different pulse widths, especially in the range that bridges transitional damage mechanisms. Metallic mirrors are ideally suited for ultrashort pulse optical systems owing to their broad spectral range. A comprehensive understanding of the damage behavior of metallic mirrors under ultrashort pulse widths is cruci

We demonstrate an all-polarization-maintaining dual-wavelength mode-locked fiber laser by bending a section of polarization maintaining fiber for intra-cavity loss tuning for the first time. This technique provides a simple way to generate dual-wavelength pulses with different repetition rate, which is potential for dual-comb spectroscopy.

We firstly demonstrate a dual-wavelength mode-locked EDF laser by utilizing a low-birefringence Lyot-filter and CNT, which delivers dual-wavelength output centers at 1532 nm and 1556 nm corresponds to the difference frequency of 3.02 THz. © 2019 The Author(s)

We demonstrate for the first time a highly customizable all polarization maintaining wavelength switchable mode-locked fiber laser by utilizing thermally controlled Lyot-filter, which delivers a 25nm tunable oujmt from 1546nm to 1571nm and a dual-wavelength outyut with central wavelength at 1545nm and 1571nm.

The saturable absorber properties of synthetic single-crystal diamond is demonstrated, and a Q-switched fiber laser using synthetic diamond as saturable absorber (SA) which could achieve multi-wavelength output is proposed and demonstrated. The wave length ranges from 1553-1561 nm with a spectrum spacing of 0.48 nm. The pulse-width of output pulse train varies from 6.4 μs to 3.32 μs and the corresponding repetition rate changes from 28.73 kHz to 114.7 kHz with pump powers between 84.8 to 754.3 m

We firstly demonstrate a dual-wavelength mode-locked EDF laser by utilizing a low-birefringence Lyot-filter and CNT, which delivers dual-wavelength output centers at 1532 nm and 1556 nm corresponds to the difference frequency of 3.02 THz.

In this report, by utilizing dispersive Fourier transform technique, the soliton dynamics including dual-wavelength mode-locking switched from single-wavelength mode-locking state and soliton collision are observed. This observation helps us to better understand the principle and to improve the performance of dual-wavelength mode-locking laser.

We demonstrate a laser cavity which can output dual-wavelength mode-locked fiber laser and wavelength tunable mode-locked fiber laser by using short length Lyot-filter. The dual-wavelength output centers at 1540 nm and 1564 nm and the tunable range of the single-wavelength mode-locked laser is from 1532 nm to 1564 nm.

Dual-wavelength mode-locked fiber laser and wavelength tunable mode-locked fiber laser have emerged as a promising light source. However, there is few reports on generating these two output from just one laser cavity. In this report, we demonstrate a dual-wavelength and wavelength tunable mode-locked fiber laser output from one laser cavity by utilizing short length Lyot filter. The central wavelengths of dual-wavelength mode-locked fiber laser are 1540 nm and 1564 nm and the tunable laser range