NDLI: Strong Mode Selection Scheme in a Layered Cylindrical Microcavity Laser with a Thin Dielectric Inner Coating

Content Provider	IEEE Xplore Digital Library
Author	Hee-Jong Moon Dong-Yun Kang
Copyright Year	2007
Description	Author affiliation: Sejong Univ., Seoul (Hee-Jong Moon; Dong-Yun Kang)
Abstract	We investigated strong mode selection scheme in a layered cylindrical microcavity laser with a thin lower refractive dielectric inner coating. We used a fused silica capillary (outer diameter of 320 mum, inner diameter of 250 mum), filled with dye-doped ethanol, as the cylindrical cavity and coated AF 1600 on the inner wall of the capillary in order to change the reflectivity of light at the inner wall. Because whispering gallery modes perturbed (or split) by inner wall, there exist interferential coupling effect whose modulation depth depends on the reflectivity of inner wall. The strongest mode selection was observed at the reflectivity of about 50%, in which corresponding thickness of AF 1600 was about 0.4 mum. Due to the enhanced interferential coupling effect, the lasing spectrum appeared as few periodic peaks just around the wavelengths corresponding to the constructive interference condition. We compared the lasing spectrum with that from a bare capillary and discussed the role of thin dielectric coating on the strong mode selection.
Starting Page	140
Ending Page	143
File Size	988036
Page Count	4
File Format	PDF
ISBN	142441248X
DOI	10.1109/ICTON.2007.4296360
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-01
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microcavities Laser modes Dielectrics Coatings Reflectivity Optical refraction Silicon compounds Ethanol Whispering gallery modes Interference dielectric coating whispering gallery modes microcavity laser mode selection
Content Type	Text
Resource Type	Article

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