Title

Dielectric selective mirror for intracavity wavelength selection in far-infrared p-Ge lasers

Authors

Authors

T. W. Du Bosq; R. E. Peale; E. W. Nelson; A. V. Muravjov; C. J. Fredricksen; N. Tache;D. B. Tanner

Abbreviated Journal Title

J. Appl. Phys.

Keywords

MODE SELECTION; FIR LASER; GERMANIUM; SILICON; Physics, Applied

Abstract

A robust metal-free intracavity fixed-wavelength selector for the cryogenically cooled far-infrared p-Ge laser is demonstrated. The device is a back mirror consisting of a thin silicon etalon and dielectric SrTiO3 flat. A laser line width of 0.2 cm-1 is achieved, which corresponds to an active cavity finesse of similar to0.15. The wavelength position and spectral purity are maintained over a wide range of laser operating fields. Use of SrTiO3 lowers the laser resonance line frequencies by similar to1 cm-1 compared with expectations for metal mirrors. The effect is due to phase shift, which is determined from far-infrared reflectivity measurements of SrTiO3. A p-Ge laser with such selector is free from danger of electrical breakdown and mirror oxidation during repeatable thermal cycling, which makes it more reliable than previous selection schemes for practical applications. (C) 2003 American Institute of Physics.

Journal Title

Journal of Applied Physics

Volume

94

Issue/Number

9

Publication Date

1-1-2003

Document Type

Article

Language

English

First Page

5474

Last Page

5478

WOS Identifier

WOS:000186138600002

ISSN

0021-8979

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