We have experimentally demonstrated a laser energy-scaling technique, based on a phase-conjugate oscillator/amplifier scheme that permits the coupling of several parallel amplifiers to form a single coherent output beam. This, is achieved despite dramatic differences in the individual amplifier energies and optical path lengths. When many amplifiers are coupled together, energy can be scaled significantly beyond the limit imposed by the maximum available volume of a single active medium. Although the present demonstration utilized Nd:YAG, this technique is quite general and can be applied to a variety of laser media.
© 1986 Optical Society of America
Original Manuscript: November 12, 1985
Manuscript Accepted: December 19, 1985
Published: March 1, 1986
D. A. Rockwell and C. R. Giuliano, "Coherent coupling of laser gain media using phase conjugation," Opt. Lett. 11, 147-149 (1986)