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Journal Article
Spectrally combined four-diode-pumped femtosecond Ti:sapphire laser with 16.3 nJ pulse and its application to video-rate coherent anti-Stokes Raman scattering spectro-microscopy
- Authors
- Dong Hoon Song, Chul Huh, Hong-Seok Seo
- Issue Date
- 2023-01
- Citation
- Optics Express, v.31, no.2, pp.3269-3277
- ISSN
- 1094-4087
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- We demonstrate the generation of high-energy femtosecond pulses by a spectrally combined four-diode-pumped Ti:sapphire laser with semi-conductor saturable absorber mirror mode locking. To achieve energy scaling, the laser cavity was extended using a design based on the Herriott multipass cell. The laser operates at a 17.5 MHz repetition rate and generates pulses with energies as high as 16.3 nJ and 80 fs in duration. The signal-to-noise ratio at the fundamental frequency showed an extinction ratio of >50 dB relative to the carrier. This compact single laser was applied to video-rate forward and backward coherent anti-Stokes Raman scattering spectro-microscopy with a pixel dwell time of 122 ns, which is the lowest dwell time ever achieved, to the best of our knowledge.
- KSP Keywords
- Coherent anti-stokes Raman scattering, Diode pumped, Dwell time, Energy scaling, Extinction Ratio(ER), Forward and Backward, Fundamental Frequency(F0), High energy, Laser cavity, Mode-locking, Multipass cell