1.3 .mu.m lasers using Nd.sup.3+ doped apatite crystals

Details 1.3 .mu.m lasers using Nd.sup.3+ doped apatite crystals 1.3 .mu.m lasers using Nd.sup.3+ doped apatite crystals

1996-11-15

1998-03-31

Scott, Jr., Leon

Coherent light generators

Particular active media

Insulating crystal

372 23, H01S 316

Patent

active

057346690

ABSTRACT:
Laser pumping and flashlamp pumping of apatite crystals such as trivalent neodymium-doped strontium fluorapatite (Sr.sub.5 (PO.sub.4).sub.3 F) emits efficient lasing at both 1.059 and 1.328 .mu.m. The pump sources for the SFAP material doped with Nd.sup.3+ includes pulsed Cr:LiSrAlF.sub.6 tuned to approximately 805.4 nm. Alternatively, similar results occurred using a continuous wave laser source of Ti:sapphire tuned to approximately 805.4 nm. A preferred embodiment includes a resonant cavity with a high reflectivity mirror having a reflectivity of 100% and an output coupler mirror with a reflectivity of less than 100%. An optional tuning component such as a Pockels Cell-Polarizer combination can also be included. The SFAP material doped with Nd.sup.3+ exhibits a large absorption cross section, high emission cross section, and long radiative lifetime.

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