Periodic optical delay line based on a tilted parabolic generatrix helicoid reflective mirror.

We report the design and testing of a novel linear scanning periodic optical delay line (ODL) by use of a helicoid reflective mirror based on a tilted parabolic generatrix that was driven by an electrical motor for a periodic change in the optical path length of the reflected light beam. The divergence and pulse front distortion of the optical beam reflected by the helicoid reflective mirror were simulated based on differential geometry. With a round-trip pass arrangement, a scanning range of delay time as large as 100 ps was obtained by spinning the helicoid reflective mirror with a pitch distance of 7.5 mm. This periodic ODL was used in an optical second-harmonic generation autocorrelator to test the linearity and temporal resolution in comparison with the autocorrelation signal obtained using an ODL structured with a motorized linear translation stage. Experiments demonstrate that our helicoid optical delay device may provide exceptional performance for optical interference, high-resolution terahertz time-domain spectroscopy, and general optical pump-probe experiments.

[1]  Manfredo P. do Carmo,et al.  Differential geometry of curves and surfaces , 1976 .

[2]  R. Fork,et al.  Real-time intensity autocorrelation interferometer. , 1978, Applied Optics.

[3]  Ray tracing through an eccentrically rotating retroreflector used for path-length alteration in a new Michelson interferometer , 1991 .

[4]  D. C. Edelstein,et al.  Rapid programmable 300 ps optical delay scanner and signal-averaging system for ultrafast measurements , 1991 .

[5]  J P Heritage,et al.  400-Hz mechanical scanning optical delay line. , 1993, Optics letters.

[6]  B E Bouma,et al.  Rapid acquisition of in vivo biological images by use of optical coherence tomography. , 1996, Optics letters.

[7]  Programmable wavelength tuning of an external-cavity diode laser , 1998, Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178).

[8]  Quing Zhu,et al.  Rotary mirror array for high-speed optical coherence tomography. , 2002, Optics letters.

[9]  Ingmar Hartl,et al.  High-speed path-length scanning with a multiple-pass cavity delay line. , 2003, Applied optics.

[10]  Daniel L Marks,et al.  Fast-Fourier-domain delay line for in vivo optical coherence tomography with a polygonal scanner. , 2003, Applied optics.

[11]  Xiumei Liu,et al.  Rapid scanning all-reflective optical delay line for real-time optical coherence tomography. , 2004, Optics letters.

[12]  Jingzhou Xu,et al.  Circular involute stage. , 2004, Optics letters.

[13]  Seok-Gy Jeon,et al.  High speed scanning of terahertz pulse by a rotary optical delay line. , 2008, The Review of scientific instruments.