Q-switching and pulse shaping with IR-lasers

R. Brinkmann*, K. Bauer

*Corresponding author for this work


The mid-infrared pulsed Holmium lasers operating around λ ≈ 2 μm are gaining more and more significance for numerous medical applications especially due to the ability to transmit the IR laser energy via recently available fiberoptic delivery systems. This paper describes a rotating mirror Q-switched Cr:Tm:Ho:YAG-laser (λ = 2.12 μm) generating pulse durations in the μs region. Pulse lengths up to 10 μs have been achieved. This time domain is expected to offer several advantages for medical applications compared to the free running pulse length of around 300 μs as well as to the 200 ns unstretched Q-switched pulse duration. Shock waves produced by laser induced plasmas have been investigated and analysed with these pulses and the fiber fragmentation resulting from the optical breakdown at high power densities was evaluated.

Original languageEnglish
JournalProceedings of SPIE - The International Society for Optical Engineering
Pages (from-to)134-139
Number of pages6
Publication statusPublished - 01.07.1991
EventProceedings of Lasers in Urology, Laparoscopy, and General Surgery - Los Angeles, United States
Duration: 21.01.199123.01.1991
Conference number: 15128

Research Areas and Centers

  • Academic Focus: Biomedical Engineering


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