Below-threshold waveguiding in a stripe-geometry junction laser

Journal Article · Tue Mar 01 04:00:00 EST 1977 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.323732· OSTI ID:7319384

Paoli, T L

Direct measurements of the intensity profile along the junction plane of a cw stripe-geometry junction laser are reported for currents extending from well below to above threshold. We find that the spatial profile of the optical intensity emitted at the wavelength of one Fabry-Perot mode exhibits a pronounced narrowing as the current is increased toward threshold. The observed behavior is shown to be consistent with an intensity distribution consisting of a Gaussian mode with current-independent width superimposed on a background of spontaneous emission. This interpretation suggests that waveguiding exists along the junction plane at currents as low as 50% below threshold and is at most weakly dependent on current.

• Research Organization: Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 7319384
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 48:3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
DISTRIBUTION
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
JUNCTION DIODES
LASERS
LAYERS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMICONDUCTOR LASERS
SPATIAL DISTRIBUTION
SPECTRA
WAVEGUIDES