Active/passive mode-locked laser oscillator

Details Active/passive mode-locked laser oscillator Active/passive mode-locked laser oscillator

1975-12-02

1977-04-19

Sikes, William L.

Oscillators

Molecular or particle resonant type

331 945Q, H01S 3098

Patent

active

040191567

ABSTRACT:
A Q-switched/mode-locked Nd:YAG laser oscillator employing simultaneous active (electro-optic) and passive (saturable absorber) loss modulation within the optical cavity is described. This "dual modulation" oscillator can produce transform-limited pulses of duration ranging from about 30 psec to about 5 nsec with greatly improved stability compared to other mode-locked systems. The pulses produced by this system lack intrapulse frequency or amplitude modulation, and hence are idealy suited for amplification to high energies and for other applications where well-defined pulses are required. Also, the pulses of this system have excellent interpulse characteristics, wherein the optical noise between the individual pulses of the pulse train has a power level well below the power of the peak pulse of the train.

REFERENCES:
patent: 3423695 (1969-01-01), Boyden
patent: 3500241 (1970-03-01), Bjorkholm
patent: 3521069 (1970-07-01), DeMaria et al.
patent: 3628173 (1971-12-01), Danielmeyer

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