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Physics
Classical Physics
Optics
Relation of laser pulse length and the Output Coupler trasmissivity
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[QUOTE="BPHH85, post: 6109166, member: 655360"] Thank you for your reply What bandwidth of the laser do you mean especially? Because the gain bandwidth is relatively fixed and may be indipendent from the OC mirror as well as the longitudinal mode bandwidth, that should in first order just depend on the cavity length. Nevertheless, bandwidth may be still a good point. A laser resonator is based on the model of the Fabry-Perot interferometer. For high reflectivity mirrors, the finesse and thus the transmission bandwidth is small. As pulsewidth t ~ ##1/\Delta f##, for short pulses the bandwidth needs to be high. But if the transmission bandwidth of the resonator is small, the spectrum of the laser pulse may be truncated and so the pulse has now a smaller spectral bandwidth and thus has to be broader in time. But this is just a guess and I'm not sure if this is the way these models are working. [/QUOTE]
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Physics
Classical Physics
Optics
Relation of laser pulse length and the Output Coupler trasmissivity
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