Fiber-coupled external-cavity semiconductor high-power laser. Report for 1 January-31 December 1989

Technical Report · Fri Jun 01 04:00:00 EDT 1990

OSTI ID:6432133

Five semiconductor gain elements (lasers with one facet AR coated) fiber-coupled were assembled into the external cavity and acting as a coherent ensemble. The combined output from the external cavity is that of a coherent laser. The concept of this program is verified with high average powers by fiber coupling of physically separated individual lasers and/or monolithic arrays into an external cavity. In this way, the density of power that has to be dissipated can be kept below the value at which it would cause excessive heating and/or would require complicated and space consuming coolers. Preliminary experiments have been performed on the sensitivity of the ensemble external cavity operation to changes in the optical length of the fiber or to rotation of the output polarization of the fiber.

• Research Organization: Massachusetts Inst. of Tech., Cambridge, MA (USA). Research Lab. of Electronics
• OSTI ID: 6432133
• Report Number(s): AD-A-224598/3/XAB; CNN: N00014-89-J-1163
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
COHERENT RADIATION
DESIGN
ELECTROMAGNETIC RADIATION
LASER CAVITIES
LASERS
OPERATION
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POLARIZATION
POWER
RADIATIONS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SOLID STATE LASERS