Coherent light generators – Particular resonant cavity – Unstable resonator
Patent
1984-04-25
1985-11-12
Sikes, William L.
Coherent light generators
Particular resonant cavity
Unstable resonator
372 9, 372108, 372 99, H01S 308
Patent
active
045532443
ABSTRACT:
The annular energy distribution in the output beam of a laser having an unstable resonator is evenly distributed across the entire beam profile by a synthesizer comprising a pair of mirrors adjacent to the output end of the resonator and operative on the output beam to redirect part of the beam from the annular outer portion to the energy-vacant central portion. One of the pair of mirrors is partially optically transmissive and concavely shaped and is disposed to reflect and converge part of the outer beam portion toward the other mirror and to transmit the balance. The other mirror is highly reflective and convexly shaped and is disposed to redirect and collimate the reflected beam part within the central portion toward the concave mirror parallel to the outer beam portion. Part of the twice reflected beam is transmitted through the concave mirror and the balance is again reflected and further converged toward the convex mirror as the cycle is repeated several times to synthesize an output beam with a substantially uniform energy profile.
REFERENCES:
patent: 3527526 (1970-09-01), Silvertooth
patent: 4123150 (1978-10-01), Sziktas
Benedict George J.
Jones Robert W.
Reed, Jr. Edward D.
Gilbert Douglas M.
GTE Communications Products Corporation
Jr. Leon Scott
Lawler John F.
Sikes William L.
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