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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 9 — Mar. 20, 2013
  • pp: 1847–1851

Narrow bandwidth and polarization independent design of hollow waveguide in-plane mirror with ultrawide tuning-range

Mukesh Kumar  »View Author Affiliations


Applied Optics, Vol. 52, Issue 9, pp. 1847-1851 (2013)
http://dx.doi.org/10.1364/AO.52.001847


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Abstract

A design of an integrated widely tunable in-plane micro-optical mirror based on a hollow waveguide (HWG) consisting of a high index contrast grating (HCG) and a dielectric multilayer distributed Bragg reflector (DBR) is proposed. The in-plane mirror is formed in a variable air-core HWG by loading a SiO2 Bragg grating on the multilayer (DBR) mirror. Ultrawide tuning of 161 and 150 nm in Bragg wavelengths of TE and TM mode, respectively are reported in simulation with a simple tuning scheme and a single tuning parameter of variable air core. The presence of HCG in the proposed design causes a reduction from 88 nm (for DBR–DBR) to 48 nm (for HCG–DBR) in the 3 dB reflection-bandwidth of the proposed in-plane mirror. Also, a four-time reduction in the difference in the reflectivity of the Bragg wavelengths of TE and TM modes is reported because of the introduction of HCG into the hollow waveguide. The reflections of orthogonal polarizations and hence the polarization characteristics of the in-plane mirror are controlled by the combined effect of HCG and DBR.

© 2013 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3990) Integrated optics : Micro-optical devices

ToC Category:
Integrated Optics

History
Original Manuscript: December 14, 2012
Revised Manuscript: February 8, 2013
Manuscript Accepted: February 8, 2013
Published: March 13, 2013

Citation
Mukesh Kumar, "Narrow bandwidth and polarization independent design of hollow waveguide in-plane mirror with ultrawide tuning-range," Appl. Opt. 52, 1847-1851 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-9-1847


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