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Unformatted text preview: tomography, and many others. 5. In solid state lasers, the energy levels of atoms are only slightly perturbed by the surrounding gas or host atoms, and remain effectively unchanged from the isolated atom. So, the emitted or absorbed photon needs to have a very specific energy. In diode lasers, the semiconductor materials are covalently bonded, and atomic levels of the atoms actually broaden into bands of allowed levels because of the perturbations from the nearby atoms, and the valence and conduction bands are formed. This gives a distribution of emitted photon energies....
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This note was uploaded on 02/02/2011 for the course ECE 227A taught by Professor Coldren during the Spring '08 term at UCSB.
- Spring '08