SHG autocorrelator

Details SHG autocorrelator SHG autocorrelator

1989-04-06

1990-11-27

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

356346, G01B 902

Patent

active

049731602

ABSTRACT:
An SHG autocorrelator for use in measuring the duration of an ultrashort pulse of light includes in one embodiment a thin pellicle beamsplitter for splitting the pulse of light into first and second beams, a stationary optical delay disposed along the path of the first beam, a movable optical delay disposed along the path of the second beam, a thin SHG crystal, a concave mirror for bringing the first and second beams to focus into the SHG crystal, a photodetector for detecting light emitted from the SHG crystal, and a narrow bandpass filter in front of the photodetector for filtering out non second harmonic light. The device reduces time broadening and delay of ultrashort pulses in the femtosecond time domain.

REFERENCES:
patent: 4705397 (1987-11-01), Tsuchiya et al.
patent: 4792230 (1988-12-01), Naganuma et al.
Fork et al., "Real-Time Intensity Interferometer", Applied Optics, vol. 17, No. 22, pp. 3534-3535, Nov. 1978.

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