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Diode-pumped SESAM mode-locked Tm:Sc2SiO5 laser
Optics Letters
|September 1, 2022
Summary
We developed the first diode-pumped passively mode-locked Thulium-doped Scandium Orthosilicate (Tm:SSO) laser. This laser operates at an eye-safe wavelength, delivering ultrashort pulses with high signal-to-noise ratio.
Area of Science:
- Lasers and Photonics
- Materials Science
Background:
- Thulium-doped crystals are crucial for generating light in the eye-safe wavelength range.
- Developing passively mode-locked lasers is key for ultrashort pulse generation.
Purpose of the Study:
- To report the first diode-pumped passively mode-locked Tm:Sc2SiO5 (Tm:SSO) laser.
- To investigate the potential of Tm:SSO crystals for generating ultrashort laser pulses.
Main Methods:
- Utilized a diode-pumped configuration for the laser system.
- Employed a semiconductor saturable absorber mirror (SESAM) for stable continuous-wave (CW) mode-locking.
- Characterized the laser output at the eye-safe wavelength of 1967.7 nm.
Main Results:
- Achieved stable CW mode-locking with a Tm:SSO laser.
- Delivered ultrashort pulses with a duration of 16.5 ps.
- Obtained an average output power of 207 mW at a repetition frequency of 81 MHz.
- Recorded a high signal-to-noise ratio of 70 dB.
Conclusions:
- The Tm:SSO crystal demonstrates significant potential for ultrashort pulse generation.
- This work establishes a new platform for eye-safe laser applications.
- Further research can optimize Tm:SSO lasers for advanced photonic applications.
