Lasing characteristics of InGaAsP/InP distributed feedback (DFB) lasers in the 1. 5 mu m range were studied theoretically and experimentally. Wave propagation in five-layer DFB waveguides were analyzed to estimate the effect of the structural parameters on threshold conditions. A brief consideration on designing a low threshold laser and its lasing wavelength was made. DFB buried heterostructure lasers with fundamental grating emitting at 1. 53 mu m were prepared by liquid phase epitaxial techniques. CW operation was confirmed in the temperature range of minus 20 degree to 58 degree C, and a cw threshold current was as low as 50 mA at room temperature.
|ジャーナル||IEEE Journal of Quantum Electronics|
|出版物ステータス||Published - 1982 8|
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)