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SECOND HARMONIC LIGHT WAVE GENERATION FROM DFB LASERS

IP.com Disclosure Number: IPCOM000024006D
Original Publication Date: 1979-Jun-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 312K

Publishing Venue

Xerox Disclosure Journal

Abstract

The integrated structures shown in Figures 1 and 2 may be employed to generate the second harmonic of GaAs/GaAlAs heterostructure lasers by nonlinear optical effects so that visible radiation in the 4000A to 4500A wavelength range may be produced, These lasers emit in the 7500A to 9000A wavelength range.

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XEROX DISCLOSURE JOURNAL

SECOND HARMONIC LIGHT WAVE GENERATION FROM DFB LASERS Robert D. Burnham
Donald R. Scifres
William Streifer

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Proposed Classification

U.S. Cl. 331/94.5 H mt. Cl. HOls 3/00

The integrated structures shown in Figures 1 and 2 may be employed to generate

the second harmonic of GaAs/GaAlAs heterostructure lasers by nonlinear optical effects so that visible radiation in the 4000A to 4500A wavelength range may be produced, These lasers emit in the 7500A to 9000A wavelength range.

Second harmonic generation (SHG) is a means whereby pumped photons of one

frequency, f, can be used to generate photons of twice the frequency, 2f, via nonlinear optical interaction.

DFB LASER SHG

SOURCE WAVE GUIDE

   r DFB LASER COUPLING SHG

SOURCE REGION WAVE GUIDE

FIG. /

z ~Ses Z~Se Z~SeS

FIG. 2

Volume 4 Number 3 May/3une 1979 365

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SECOND HARMONIC LIGHT WAVE GENERATION FROM DFB LASERS (Cont~d)

In Figure 1, the active layer and waveguide 12 of the distributed feedback (DFB) laser 10 is in alignment with the waveguide 22 of the (SHG) region 20. The thickness of the SHG waveguide 22 is chosen to achieve optical phase matching between the f and 2f optical guided waves

                           0 The dimensions of the SHG waveguide 22 need not be physically matched to those of the laser waveguide and active region 12.

The DFB laser is chosen because of its inherent possession of single, longitudinal mode selectivity.

The optical power...