상세정보
학술지
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
- 발행일
- 202301
- 출처
- Optics Express, v.31 no.2, pp.3269-3277
- ISSN
- 1094-4087
- 출판사
- Optical Society of America (OSA)
- 협약과제
- 23IR4100, 감염병 예방을 위한 스포츠 시설 이용 안전 기술 개발, 허철
- 초록
- 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 제안 키워드
- Coherent anti-stokes Raman scattering, Diode pumped, Dwell Time, Energy scaling, Forward and Backward, Fundamental Frequency, Laser cavity, Mode-locking, Multipass cell, Raman scattering(SERS), Repetition rate