Abstract
We demonstrate the design of a fibre optic beam delivery system for particle image velocimetry (PIV) applications. The system is capable of transmitting pulse energies of about 10 mJ in 7 ns pulses from a frequency doubled and Q-switched Nd:YAG laser; it is hence suitable for use with high speed air flows. The fibre used has a fused silica core of diameter 400 µm, and is of the step index multimode type. The output beam quality is 800 mm-mrad. Through exploitation of intermodal dispersion in the fibre, intensity variations in the output from the fibre due to speckle are suppressed to a visibility of <7%.
Original language | English |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
Pages | 675-682 |
Number of pages | 8 |
Volume | 2052 |
Publication status | Published - 1993 |
Event | Fifth International Conference on Laser Anemometry - Koningshof, Veldhoven, Neth Duration: 23 Aug 1993 → 27 Aug 1993 |
Conference
Conference | Fifth International Conference on Laser Anemometry |
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City | Koningshof, Veldhoven, Neth |
Period | 23/08/93 → 27/08/93 |