Coherent light generators – Particular active media – Insulating crystal
Patent
1989-09-26
1990-06-05
Scott, Jr., Leon
Coherent light generators
Particular active media
Insulating crystal
372 18, 372 20, 372 69, 372 94, 372 13, H01S 316
Patent
active
049320319
ABSTRACT:
A laser system in which the laser medium is a single crystal of Cr.sub.3+ :Mg.sub.2 SiO.sub.4 is disclosed. In one embodiment, the system comprises a single crystal of chromium doped forsterite and a cavity which includes a pair of 30 cm. radius mirror having high transmission at 543 nm (the pump wavelength) and high reflectivity in the 1150-1350 nm range. Room temperature vibronic pulsed laser action is obtained with this cavity. Laser action has been observed at 1235 nm and a bandwidth of 25 nm. The wavelength range is suitable for transmission through optical fibers and is useful in laser ranging and remote sensing. Because of the ultrawide fluorescence bandwidth and a 15 fluoroescence lifetime the system is suitable for high intensity, tunable, cw, Q switched mode locked operation. In the mode locked operation pulses as short as 10-500 femtosecond may be generated. A number of different embodiments of the invention are described.
Alfano Robert R.
Gayen Swapan
Petricevic Vladimir
Jr. Leon Scott
Kriegsman Irving M.
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