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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 19, Iss. 6 — Mar. 15, 1994
  • pp: 396–398

Dual-polarization modes and self-heterodyne noise in a single-frequency 2.1-μm microchip Ho,Tm:YAG laser

Chuan He and Dennis K. Killinger  »View Author Affiliations


Optics Letters, Vol. 19, Issue 6, pp. 396-398 (1994)
http://dx.doi.org/10.1364/OL.19.000396


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Abstract

We have observed, for the first time to our knowledge, residual stress-induced birefringent dual-polarization modes in a diode-pumped, single-frequency, microchip cw 2.0914-μm Ho,Tm:YAG laser. The two orthogonally polarized modes were separated in frequency by approximately 12 MHz and, when photodetected, produced a 12-MHz self-heterodyne beat signal. The self-heterodyne signal could be eliminated by an external λ/4 plate and a polarizer to filter out one of the modes, but this required regulation of the pump laser power to better than 1%. These results have important implications for use of the microchip Ho,Tm:YAG laser in a heterodyne detection coherent lidar.

© 1994 Optical Society of America

History
Original Manuscript: September 29, 1993
Published: March 15, 1994

Citation
Chuan He and Dennis K. Killinger, "Dual-polarization modes and self-heterodyne noise in a single-frequency 2.1-μm microchip Ho,Tm:YAG laser," Opt. Lett. 19, 396-398 (1994)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-19-6-396

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