Watt-Level Dual-Wavelength Q-Switched Mode-Locked All-Solid-State Tm:CYA Laser | Zendy

Chen Chen | Zendy; Weijun Ling | Zendy; Rui Sun | Zendy; Qiang Xu | Zendy; Yani Zhang | Zendy

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Watt-Level Dual-Wavelength Q-Switched Mode-Locked All-Solid-State Tm:CYA Laser

Author(s) -

Chen Chen,

Weijun Ling,

Rui Sun,

Qiang Xu,

Yani Zhang

Publication year - 2020

Publication title -

frontiers in physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.754

H-Index - 31

ISSN - 2296-424X

DOI - 10.3389/fphy.2019.00252

Subject(s) - laser , materials science , mode locking , optics , power (physics) , diode , saturable absorption , wavelength , optoelectronics , q switching , modulation (music) , envelope (radar) , pulse width modulation , physics , fiber laser , telecommunications , radar , quantum mechanics , computer science , acoustics

A passively Q-switched mode-locked all-solid-state Tm:CaYAIO4 (Tm:CYA) laser with a MoS2 saturable absorber is demonstrated for the first time. Employing a typical X-type cavity and output coupling mirror of 9%, when the laser diode pump power is higher than 8.5 W, the laser enters into a stable Q-switched mode-locked operation, further increasing the pump power into a dual-wavelength operating state; the corresponding typical center wavelengths are 1,863 and 1,877 nm. When the pump power reaches 20 W, the maximum output power is 1.15 W, the frequency of mode-locked pulse is 103.7 MHz, and the modulation depth of mode-locked pulses in the Q envelope is close to 100%. The results prove that MoS2 saturable absorber is suitable for 2-μm high-power mode locking.

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