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Prototype laser-diode-pumped solid state laser transmitters
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kane, Thomas J. Wallace, Richard W. Cheng, Emily A. P. |
| Copyright Year | 1989 |
| Description | Monolithic, diode-pumped Nd:YAG ring lasers can provide diffraction-limited, single-frequency, narrow-linewidth, tunable output which is adequate for use as a local oscillator in a coherent communication system. A laser was built which had a linewidth of about 2 kHz, a power of 5 milliwatts, and which was tunable over a range of 30 MHz in a few microseconds. This laser was phase-locked to a second, similar laser. This demonstrates that the powerful technique of heterodyne detection is possible with a diode-pumped laser used as the local oscillator. Laser diode pumping of monolithic Nd:YAG rings can lead to output powers of hundreds of milliwatts from a single laser. A laser was built with a single-mode output of 310 mW. Several lasers can be chained together to sum their power, while maintaining diffraction-limited, single frequency operation. This technique was demonstrated with two lasers, with a total output of 340 mW, and is expected to be practical for up to about ten lasers. Thus with lasers of 310 mW, output of up to 3 W is possible. The chaining technique, if properly engineered, results in redundancy. The technique of resonant external modulation and doubling is designed to efficiently convert the continuous wave, infrared output of our lasers into low duty-cycle pulsed green output. This technique was verified through both computer modeling and experimentation. Further work would be necessary to develop a deliverable system using this technique. |
| File Size | 4733209 |
| Page Count | 64 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890015230 |
| Archival Resource Key | ark:/13960/t59d1v521 |
| Language | English |
| Publisher Date | 1989-06-01 |
| Access Restriction | Open |
| Subject Keyword | Lasers And Masers Frequency Modulation Semiconductor Lasers Power Spectra Glass Lasers Heterodyning Yag Lasers Optoelectronic Devices Laser Materials Optical Pumping Frequency Ranges Oscillators Neodymium 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 |
