Scanning optical delay device having a helicoid reflecting mirro

Details Scanning optical delay device having a helicoid reflecting mirro Scanning optical delay device having a helicoid reflecting mirro

1998-06-16

1999-03-23

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359198, 359200, 359201, 359850, 359203, G02B 2608

Patent

active

058868062

ABSTRACT:
A rapid and linear scanning optical delay line was attained by the use of a helicoid reflecting mirror which was spun by a DC servo motor for bringing about a periodic change in the optical path length of the reflected light beam. The double-pass scanning range of the delay time as large as 80 picosecond was attained by the scanning optical delay line having a helicoid reflecting mirror having 12 mm in pitch distance. The scanning optical delay line was used in an optical second-harmonic generation autocorrelator, which was thus capable of scanning successfully a picosecond optical pulse train. A real-time scanning of the picosecond laser pulse of a mode-locked Titanium:Sapphire was verified.

REFERENCES:
patent: 4494821 (1985-01-01), Lewis et al.
patent: 4632500 (1986-12-01), Fetzer
patent: 4961080 (1990-10-01), Henderson et al.
patent: 5153769 (1992-10-01), Rubinstein et al.
R.F. Fork and F.A. Beissoer, "Real-time intensity autocorrelation interferometer," Appl. Opt. vol. 17, No. 22, pp. 3534-3535, Nov. 1978.
Z.A. Yasa and N.M. Amer, "A Rapid-Scanning Autocorrelation Scheme for Continuous Monitoring of Picosecond Laser Pulses," Opt. Commun. vol. 36, No. 5, pp. 406-408, Mar. 1981.

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