Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1994),
  • paper CFG6

Enhanced second harmonic femtosecond pulse generation in quasi-phase-matched thin film structures

Not Accessible

Your library or personal account may give you access

Abstract

We have recently reported1 the generation of ~10-fs duration 315-nm wavelength pulses by frequency doubling of ~14-fs pulses, derived from a CPM laser, in a poled copolymer film of 2.2-μm thickness. The group velocity mismatch (GVM), which broadens the frequency doubled pulses, was negligible that allows the doubling of even shorter pulses. The measured conversion efficiency (0.025%) was good for such a thin film, owing to the high value of the non-linear coefficient and to the remarkably high (~160 GW/cm2) damage threshold. To increase the conversion efficiency, the interaction length, which in the reported work1 was limited by the phase mismatch, should be increased. Since conventional methods of phase-matching are not possible in poled organic films, other methods must be used. We report here the results of theoretical and experimental investigation of femtosecond second harmonic generation (FSHG) in both anomalously-phase-matched and quasi-phase-matched (QPM) structures.

© 1994 Optical Society of America

PDF Article
More Like This
Generation of 315 mn, femtosecond pulses using a poled copolymer film

D. R. Yankelevich, A. Dienes, A. Knoesen, R. W. Schoenlein, C. V. Shank, and G. A. Lindsay
CPD16 Conference on Lasers and Electro-Optics (CLEO:S&I) 1991

Femtosecond second harmonic generation and autocorrelation applications using nonlinear poled polymeric thin films

A. Knoesen, D.R. Yankelevich, A. Dienes, R.W. Schoenlein, and C. V. Shank
ThMM35 OSA Annual Meeting (FIO) 1991

Quasi-phase-matched second-harmonic generation from femtosecond pulses in chirped gratings

G. Y. Wang, S. D. Koehler, and E. M. Garmire
WO.5 OSA Annual Meeting (FIO) 1993

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved