| タイトル | Single-mode laser studies: Design and performance of a fixed-wave length source and coupling of lasers to thin-film optical waveguides |
| 本文（外部サイト） | http://hdl.handle.net/2060/19800025227 |
| 著者（英） | Hammer, J. M.; Ladany, I. |
| 著者所属（英） | RCA Labs. |
| 発行日 | 1980-10-01 |
| 言語 | eng |
| 内容記述 | A module developed for the generation of a stable single wavelength to be used for a fiber optic multiplexing scheme is described. The laser is driven with RZ pulses, and the temperature is stabilized thermoelectrically. The unit is capable of maintaining a fixed wavelength within about 6 A as the pulse duty cycle is changed between 0 and 100 percent. This is considered the most severe case, and much tighter tolerances are obtainable for constant input power coding schemes. Using a constricted double heterostructure laser, a wavelength shift of 0.083 A mA is obtained due to laser self-heating by a dc driving current. The thermoelectric unit is capable of maintaining a constant laser heat-sink temperature within 0.02 C. In addition, miniature lenses and couplers are described which allow efficient coupling of single wavelength modes of junction lasers to thin film optical waveguides. The design of the miniature cylinder lenses and the prism coupling techniques allow 2 mW of single wavelength mode junction laser light to b coupled into thin film waveguides using compact assemblies. Selective grating couplers are also studied. |
| NASA分類 | LASERS AND MASERS |
| レポートNO | 80N33735
PRRL-80-CR-13
NASA-CR-3341
FR-2 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/171047 |
