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Q1: A He-Ne helium-neon laser with a wavelength of 633 nm and an effective medium length of 14 cm
consists of two mirrors, one with a reflectivity of 90% and the other for 100%, and a gain factor
of the effectivemedium equa to 0.15m. neglect ing the sources of loss Calculatethe number of times the photons pass back and forth until athreshold is obtaned for the gan factor.
Transcribed Image Text:Q1: A He-Ne helium-neon laser with a wavelength of 633 nm and an effective medium length of 14 cm consists of two mirrors, one with a reflectivity of 90% and the other for 100%, and a gain factor of the effectivemedium equa to 0.15m. neglect ing the sources of loss Calculatethe number of times the photons pass back and forth until athreshold is obtaned for the gan factor.
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