Ultrashort-pulse measurement using noninstantaneous nonlinearities: Raman effects in frequency-resolved optical gating

Journal Article · Wed Mar 01 00:00:00 EST 1995 · Optics Letters

DOI:https://doi.org/10.1364/OL.20.000486· OSTI ID:45537

DeLong, K W; Ladera, C L; Trebino, R ^[1]; Kohler, B; Wilson, K R ^[2]

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1. MS 9057, Sandia National Laboratories, Livermore, California 94551-0969 (United States)
2. Department of Chemistry, MS 0339, University of California, San Diego, La Jolla, California 92093-0339 (United States)

Ultrashort-pulse-characterization techniques generally require instantaneously responding media. We show that this is not the case for frequency-resolved optical gating (FROG). We include, as an example, the noninstantaneous Raman response of fused silica, which can cause errors in the retrieved pulse width of as much as 8% for a 25-fs pulse in polarization-gate FROG. We present a modified pulse-retrieval algorithm that deconvolves such slow effects and use it to retrieve pulses of any width. In experiments with 45-fs pulses this algorithm achieved better convergence and yielded a shorter pulse than previous FROG algorithms.

• Sponsoring Organization: USDOE
• OSTI ID: 45537
• Journal Information: Optics Letters, Vol. 20, Issue 5; Other Information: PBD: 1 Mar 1995
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
66 PHYSICS
SOLID STATE LASERS
RAMAN EFFECT
ALGORITHMS
PULSE TECHNIQUES