Method for suppressing solar background in a receiver of laser l

Details Method for suppressing solar background in a receiver of laser l Method for suppressing solar background in a receiver of laser l

1991-06-28

1994-05-10

Ben, Loha

Optical: systems and elements

Absorption filter

Fluid

359900, 2504581, 2504591, G02B 2700

Patent

active

053113691

ABSTRACT:
Two new passive atomic filters that operate at 422.67 nm and 460.73 nm respectively are disclosed. The filter wavelengths overlap Fraunhofer lines, thereby providing outstanding sunlight rejection. The new calcium filter utilizes collisional energy transfer with Xenon to wavelength shift the violet light to 657.28 nm. An internal photon conversion efficiency of 25% was recorded. The new strontium filter utilizes collisions with noble gases to produce emission at 689.26 nm. An internal photon conversion efficiency of 45% was recorded.

REFERENCES:
patent: 4070101 (1978-01-01), Richards et al.
patent: 4093352 (1978-06-01), Pisar
patent: 4292526 (1981-09-01), Marling
patent: 4309080 (1982-01-01), Hanchard et al.
patent: 4431257 (1984-02-01), Born

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