Controlled two-pulse generation in Q-switch mode from a single laser using Q-modulator with frustrated total internal reflection |
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Authors: | D Slavov |
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Institution: | (1) Condensed Matter Laser Laboratory, Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chausse Blvd., 1784 Sofia, Bulgaria, BG |
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Abstract: | In this work a cavity design for double-pulse generation in Q-switched mode from a single laser is proposed, based on the
construction of a second laser channel using a FTIR (frustrated total internal reflection) Q-modulator. A time interval between
the two pulses from 500 ns to 120 μs is obtained in a Nd:YAG laser. A comparison with other methods and cavity designs for
double-pulse generation is presented. The case when this technique is applied on a tunable laser with metastable upper laser
level (Cr:LiCAF, Cr:LiSAF, Alexandrite, Co:MgF2 or other) is also considered. Even though the method presented in the paper does not rely only on the cavity configuration
proposed, some advantages can be obtained – both polarization and wavelength-independent tuning without polarization and wavelength
restrictions in combination with the possibility of different wavelengths and polarizations in each pulse. Moreover, by using
an active medium generating wavelengths around and up to 3 μm, the Pockels-cell-Q-switch optical transmission problems can
be avoided.
Received: 9 May 2001 / Revised version: 2 August 2001 / Published online: 15 October 2001 |
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Keywords: | PACS: 42 60 By 42 60 Da 42 60 Gd |
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