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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Sinclair, B.D. |
| Copyright Year | 1999 |
| Description | Author affiliation: St. Andrews Univ., UK (Sinclair, B.D.) |
| Abstract | Microchip lasers are made of a simple slice of solid-state laser material, coated on both sides, and pumped with a diode laser. This geometry forms a particularly simple laser cavity. The cavity, which is otherwise on the edge of stability, is made stable by thermal and gain-related effects, producing a high quality TEM/sub 00/ laser beam. The simplicity leads to ease of mass-manufacture and low cost. The short length encourages single-frequency operation, and the short cavity decay time can allow the generation of short pulses. The extension of these ideas to involve additional intracavity components has allowed the demonstration of "simple" lasers that operate in an actively or passively Q-switched mode, lasers that are frequency agile, and CW and pulsed lasers that are frequency shifted into the visible and other spectral ranges. One part of our work has been in investigating the cavity stability mechanisms of these lasers. These can be thermally-related involving a distributed thermal lens through dn/dT effects or involving thermal expansion of the pumped face, or they can be gain-related involving elements of gain guiding or changes in refractive index associated with the spatially dependent gain. Such effects are strongly dependent on the gain material used. Under certain conditions we have observed a form of self-Q-switching in Nd:YVO/sub 4/ microchip lasers, which our experiments and modelling suggest is associated with spatial variation of the gain and how this impacts on the guiding of different longitudinal modes. |
| Starting Page | 850 |
| Ending Page | 851 |
| File Size | 197024 |
| Page Count | 2 |
| File Format | |
| ISBN | 0780356349 |
| ISSN | 10928081 |
| DOI | 10.1109/LEOS.1999.812001 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1999-11-08 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Pump lasers Laser modes Laser stability Thermal expansion Thermal lensing Solid lasers Optical materials Frequency Laser excitation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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