Accession Number : ADP007606

Title :   Distributed Out Coupling of Second Harmonic Generation in a Waveguide,

Corporate Author : TEL-AVIV UNIV (ISRAEL)

Personal Author(s) : Weissman, Z. ; Harky, A. ; Marom, E.

Report Date : 22 MAY 1992

Pagination or Media Count : 3

Abstract : Frequency doubling of diode-laser light has been studied recently, to obtain compact short-wavelength coherent sources (e.g. green and blue) for various applications.' In some materials, a strong optical nonlinearity is coupled with strong absorption and large dispersion, both of which prevent an efficient out-coupling of the SHG radiation. In many cases the harmonic absorption is strong, whereas the fundamental absorption is weak. This is typical to semiconductors in the vicinity of the band-gap, as well as to some organic materials, which strongly absorb in the green/blue region. In order to benefit from the large nonlinearity of these waveguide materials, it is essential to overcome absorption and dispersion. Whereas dispersion effects may be reduced by using various phase-matching techniques, absorption remains a problem. Here we propose a new way to reduce the effects of harmonic absorption in an SHG waveguide, as well as those of the dispersion.

Descriptors :   *OPTICAL WAVEGUIDES, *FREQUENCY MULTIPLIERS, DIODES, DISPERSIONS, FREQUENCY, HARMONICS, LASERS, LIGHT, MATCHING, ORGANIC MATERIALS, PHASE, REGIONS, SEMICONDUCTORS, SYMPOSIA, ISRAEL, RADIATION ABSORPTION, WAVEGUIDE COUPLERS.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE