Title: Laser apparatus

Abstract: An infrared laser is described which is optically pumped by a pump laser operating at a visible wavelength. The polarization of the pump, is opposite from the lasing polarization, and is coupled colinearly with the laser beam by a Brewster angle polarization beam splitter in the laser beam path which reflects the pump polarization while transmitting the lasing polarization. Leakage of the pump polarization through the beam splitter provides a visible tracer propagating colinearly with the laser beam which permits the location of the invisible infrared beam and its alignment with respect to apparatus which utilizes the beam.

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Inventors: German, Kenneth R. (Fairport, NY, US)

Application Number: 861159
Filing Date: 1977-12-16
Publication_date: 1980-06-17
Assignee: Burleigh Instruments, Inc. (Fishers, NY)
Primary Class(es): 372/42 356/153, 372/20, 372/71, 372/100, 372/102, 372/105, 372/108
Other Classes:
US Patent Ref:

3438694	Apr, 1969	Reid et al.	350/171.
3970960	Jul, 1976	Mollenauer	331/94.
4054852	Oct, 1977	Nicolai	331/94.

Other Refs:
Primary Examiner: Sikes, William L.
Assistant Examiner:
Attorney: LuKacher; Martin