Parameter ranges for c-w passive mode locking
CW passive mode locking of a homogeneously broadened laser is considered. In the coordinate plane, whose abscissa is proportional to the small-signal saturable absorber loading, and whose ordinate is proportional to the small-signal gain, the following regimes are laid out: (1) steady-state single-pulse mode-locking solutions; (2) stability against relaxation oscillations; and (3) self-starting of mode locking. The assumption is made that CW mode locking can be obtained only for a choice of parameters for which all three regimes overlap. It is required further that the overlap regime be reached by a monotonic increase of small-signal gain (pumping), without passing outside regime (2). Under these conditions one may state requirements on the system parameters for the obtainment of single-pulse mode locking by a saturable absorber. The analysis explains why it has been impossible to mode lock passively the CW Nd : YAG laser, but passive mode locking of the CW dye-laser system is possible.
- Research Organization:
- Bell Labs., Holmdel, NJ
- OSTI ID:
- 7356717
- Journal Information:
- IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. QE-12:3; ISSN IEJQA
- Country of Publication:
- United States
- Language:
- English
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