Unformatted text preview: ction onances of a Fabry-Perot cavity. The width of the resonances depends on the reflectivity R of the
. The resonances of a Fabry-Perot cavity. The width of the resonances depends on the reflectivity R of the
mirrors. gia Tech
Georgia Tech ECEECE 3080 - Dr. Alan Doolittl
3080 - Dr. Alan Doolittle EE 332 Spring 2013 Wavelength Selection
Cavity Modes + Gain evelopment of lasing. (a)(a) The gain distribution is thsame as the spontaneous emission spectrum. (b) Only
Development of lasing. The gain distribution is the e same as the spontaneous emission spectrum. (b) Only
he the photons thethe resonance will amplify. The ones nearhe center of the gain curve will amplify the fastest.
photons at at resonance will amplify. The ones near t the center of the gain curve will amplify the fastest.
Georgia Tech ECE 3080 --Dr. Alan Doolittle
ECE 3080 Dr. Alan Doolittle EE 332 Spring 2013 Edge and Surface Emitting LASERs Emitting
Vertical Cavity Surface ipline or Edge Emitting LASER (VECSEL) • A vertical cavity surface-emitting laser. (After Ueki et al., IEEE Photonics Technology
pp. 1539–1541, 1999, © IEEE.)
attern of a simple “stripline”, edge-emitting laser is elliptical and widely divergent.Reflectors (DBR) mirrors require very precise growth control. Re
varied as much as possible (while still remaining electrically conductive) and must be
of a wavelength VECSEL Georgia Tech
ECE 3080 - Dr. Alan Doolittle ECE 3 EE 332 Spring 2013...
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