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Distributed feedback lasers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Andrews, J. T. Evans, G. A. Ladany, I. |
| Copyright Year | 1988 |
| Description | A ridge waveguide distributed feedback laser was developed in InGaAsP. These devices have demonstrated CW output powers over 7 mW with threshold currents as low as 60 mA at 25 C. Measurements of the frequency response of these devices show a 3 dB bandwidth of about 2 GHz, which may be limited by the mount. The best devices have a single mode spectra over the entire temperature range tested with a side mode suppression of about 20 dB in both CW and pulsed modes. The design of this device, including detailed modeling of the ridge guide structure, effective index calculations, and a discussion of the grating configuration are presented. Also, the fabrication of the devices is presented in some detail, especially the fabrication of and subsequent growth over the grating. In addition, a high frequency fiber pigtailed package was designed and tested, which is a suitable prototype for a commercial package. |
| File Size | 4109231 |
| Page Count | 87 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19880015564 |
| Archival Resource Key | ark:/13960/t6tx8729c |
| Language | English |
| Publisher Date | 1988-06-01 |
| Access Restriction | Open |
| Subject Keyword | Lasers And Masers Threshold Currents Gallium Phosphides Laser Outputs Gallium Arsenides Semiconductor Lasers Temperature Effects Indium Phosphides Waveguide Lasers Laser Modes Continuous Wave Lasers Distributed Feedback Lasers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
