Passive Q switching and mode-locking of Er:glass lasers using VO2 mirrors
Pollack, S. A. ; Chang, D. B. ; Chudnovky, F. A. ; Khakhaev, I. A.
[S.l.] : American Institute of Physics (AIP)
Published 1995
[S.l.] : American Institute of Physics (AIP)
Published 1995
| ISSN: |
1089-7550
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|---|---|
| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
Passive Q switching of an Er:glass laser with the pulse width varying between 14 and 80 ns has been demonstrated, using three resonator vanadium-dioxide-coated (VO2) mirror samples with temperature-dependent reflectivity and differing in the reflectivity contrast. The reflectivity changes because of a phase transition from a semiconductor to a metallic state. Broad band operating characteristics of VO2 mirrors provide Q switching over a wide range of wavelengths. In addition, mode-locked pulses with much shorter time scales have been observed, due to exciton formation and recombination. A simple criterion is derived for the allowable ambient temperatures at which the Q switching operates effectively. A simple relation has also been found relating the duration of the Q-switched pulse to the contrast in reflectivities of the two mirror phases. © 1995 American Institute of Physics.
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| Type of Medium: |
Electronic Resource
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| URL: |