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

Autor:	T. W. Du Bosq, N. Tache, Andrei V. Muravjov, David B. Tanner, Robert E. Peale, E.W. Nelson, C. J. Fredricksen
Rok vydání:	2003
Předmět:	Distributed feedback laser Materials science business.industry Far-infrared laser General Physics and Astronomy Laser pumping Laser law.invention Vertical-cavity surface-emitting laser Laser linewidth Optics law Optoelectronics Laser power scaling business Tunable laser
Zdroj:	Journal of Applied Physics. 94:5474-5478
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1618934
Popis:	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 ∼0.15. 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 ∼1 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::912d7fe2dfeef81cc66e6e4aff042618 https://doi.org/10.1063/1.1618934 Zobrazit plný text záznamu