Measurement of ultrashort laser pulses using single-crystal films of 4-aminobenzophenone

Bhowmik, Achintya K. ; Tan, Shida ; Ahyi, Ayayi C. ; Dharmadhikari, J. A. ; Dharmadhikari, A. K. ; Mathur, D. (2007) Measurement of ultrashort laser pulses using single-crystal films of 4-aminobenzophenone Optics Communications, 280 (2). pp. 472-476. ISSN 0030-4018

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.optcom.2007.08.035

Abstract

Single-crystal thin-film of an organic second-order nonlinear optical material, 4-aminobenzophenone (ABP), is used to measure the pulsewidth of a Ti-Sapphire laser producing ~45 fs pulses at 1 kHz repetition rate, by the non-collinear second-harmonic generation (SHG) intensity autocorrelation technique. These films are suitable for measurements over a broad wavelength range, down to 780 nm, due to their wide optical transparency. The single-crystal film with thickness (~3 μ m) less than the coherence length requires no phase-matching for efficient broadband SHG. Pulse walk-off due to group-velocity mismatch (GVM) and temporal broadening of the pulses due to group-velocity dispersion (GVD) are found to be negligible. These effects have been estimated for pulse width down to few-cycle pulses (~10 fs), and the analyses show that these films can be used to characterize such ultrashort optical pulses.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:77605
Deposited On:13 Jan 2012 11:44
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