Abstract

We report a new Nd:YAG-pumped picosecond optical parametric oscillator that generates bandwidth-limited pulses. Using two LiNbO3 crystals, it produces tunable, near-1.4-μm (signal-wave) pulses of 18-psec duration and Δν = 1.2 cm−1 FWHM (Δντ = 0.7). The output energy of the optical parametric oscillator in a signal wave is no less than 2 mJ with 10% energy stability. The key to this device is the injection of cw single-frequency GaAs diode-laser radiation. Using the injection of diode-laser radiation, we have measured the spectral intensity of a quantum noise at λ = 0.85 μm. The intensity was found to be 6 ± 2 W/cm2 cm−1 sr (theoretical value, 4.7 W/cm2 cm−1 sr).

© 1986 Optical Society of America

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