Important loss mechanisms in visible lasers revealed by hydrostatic pressure
- Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
- Philips Optoelectronics Centre, Eindhoven (Netherlands)
The authors find that above 10 kbar, the effect of pressure on the threshold current of visible lasers is to increase losses to the X minima in the barriers. Below 10 kbar the threshold current remains relatively constant with pressure. By monitoring the lasing wavelength, they have measured the pressure dependence of the direct band gap of ordered GaInP to be 7 meV/kbar. Considerations of the effect of strain in the active region of a laser lead them to propose that increases in threshold current for tensile strained visible lasers as a function of increasing strain are due to losses from the [Gamma] minimum to X minima in the well. Similar increases in I[sub th] observed at high compressive strains can be explained by the reduction in well width, and hence optical confinement factor, which is necessary to maintain the same operating wavelength as the strain is increased.
- OSTI ID:
- 5833320
- Journal Information:
- IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States), Vol. 29:6; ISSN 0018-9197
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GALLIUM PHOSPHIDES
ENERGY GAP
INDIUM PHOSPHIDES
SEMICONDUCTOR LASERS
THRESHOLD CURRENT
BAND THEORY
EXPERIMENTAL DATA
HETEROJUNCTIONS
LOSSES
PRESSURE DEPENDENCE
STRAINS
VISIBLE RADIATION
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTROMAGNETIC RADIATION
GALLIUM COMPOUNDS
INDIUM COMPOUNDS
INFORMATION
JUNCTIONS
LASERS
NUMERICAL DATA
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PNICTIDES
RADIATIONS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR JUNCTIONS
SOLID STATE LASERS
426002* - Engineering- Lasers & Masers- (1990-)