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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1992),
  • paper QFA1

Bidirectional oscillation and phase conjugation in a sodium-vapor ring resonator

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Abstract

We report what is, to our knowledge, the first observation of bidirectional lasing in a ring resonator using sodium vapor pumped with a unidirectional laser beam. When both oscillations are present simultaneously, a phase- conjugate signal is observed having a reflectivity of 0.7% to 720 W/cm2 of input pump intensity. Although more efficient self- pumped conjugation has been achieved in sodium vapor at lower pump intensity levels,1,2 the present scheme has the advantage that a cw phase-conjugate signal can be observed using a nonfrequency stabilized dye laser (free-running jitter of about 50 MHz). Previous observation of cw self-pumped phase conjugation with a broad laser source yielded somewhat lower reflectivity.3

© 1992 Optical Society of America

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