Two-dimensional theory of distributed feedback semiconductor lasers

Journal Article · Thu Mar 01 00:00:00 EST 1990 · IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/3.52122· OSTI ID:6876748

Sato, H; Hori, Y ^[1]

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1. Semiconductor Research Center, Matsushita Electric Industrial Co., Ltd., Moriguchi, Osaka 570 (JP)

The authors present a theory which takes account of two-dimensional waveguide structures of DFB lasers. Laser threshold conditions in the case of no external reflections are calculated for the three-layer model in which one cladding layer has a periodically changing dielectric constant. In contrast with the coupled-wave theory the threshold conditions are found to be asymmetric with respect to the Bragg frequency. The longitudinal mode which lies below and nearest the Bragg frequency has the lowest threshold gain. The difference between the threshold gains of two adjacent modes on both sides of the Bragg frequency has a maximum as a function of the coupling strength of the grating.

• OSTI ID: 6876748
• Journal Information: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (USA), Vol. 26:3; ISSN 0018-9197
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
47 OTHER INSTRUMENTATION
SEMICONDUCTOR LASERS
THRESHOLD CURRENT
WAVEGUIDES
TWO-DIMENSIONAL CALCULATIONS
BRAGG REFLECTION
CALCULATION METHODS
COUPLING CONSTANTS
DIELECTRIC PROPERTIES
DIFFRACTION GRATINGS
GAIN
AMPLIFICATION
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
GRATINGS
LASERS
PHYSICAL PROPERTIES
REFLECTION
SEMICONDUCTOR DEVICES
SOLID STATE LASERS
426002* - Engineering- Lasers & Masers- (1990-)
440600 - Optical Instrumentation- (1990-)