Astigmatism and spontaneous emission factor of laser diodes with parabolic gain

Journal Article · Fri Apr 01 04:00:00 EST 1983 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.332261· OSTI ID:5580037

Mamine, T

An explicit relation between the astigmatism and the spontaneous emission factor of gain guiding lasers has been derived with the assumption that the gain profile can be approximated to be a parabola or that the lowest order mode in the cavity is approximately Gaussian. The maximum value of the spontaneous emission factor is shown to be ..sqrt..2 if index guiding is dominant. Beyond K = ..sqrt..2, where gain guiding is dominant in this region, the astigmatism decreases with the spontaneous emission factor. It is also shown that the spontaneous emission factor of the gain guiding lasers does not much exceed ten and this conclusion has been confirmed experimentally for those whose stripe widths are larger than 4 ..mu..m.

• Research Organization: Semiconductor Research Department, Semiconductor Division, SONY Corporation at Atsugi-Plant, 4-14-1 Asahi-shi 243, Japan
• OSTI ID: 5580037
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 54:4; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
DISTRIBUTION
EMISSION
GAIN
GEOMETRICAL ABERRATIONS
LASER CAVITIES
LASERS
MATHEMATICAL MODELS
OSCILLATION MODES
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMICONDUCTOR LASERS
SPATIAL DISTRIBUTION