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Loss and dispersion tailoring in 1D photonics band gap Bragg reflection waveguides: finite chirped claddings as a design tool

Loss and dispersion tailoring in 1D photonics band gap Bragg reflection waveguides: finite chirped claddings as a design tool
Loss and dispersion tailoring in 1D photonics band gap Bragg reflection waveguides: finite chirped claddings as a design tool
We exploit a simple and accurate matrix method to analyze the effects of introducing a linear chirp either in thickness or in refractive index of the cladding layers on the propagation characteristics (loss and dispersion) of 1D photonic band gap planar Bragg reflection waveguides (BRWs). We show that an appropriate chirp in the otherwise periodic claddings of finite extent BRWs could be gainfully exploited to tailor its leakage loss and waveguide dispersion features. In particular, we theoretically demonstrate that for some reported sample BRWs, leakage loss and waveguide dispersion could be significantly reduced by a factor of 30-50 and by about two orders of magnitude, respectively as compared to un-chirped BRWs. Furthermore, we also show that in contrast to un-chirped BRWs, how chirped BRWs could be designed with attractive feature like much less number of cladding layers and nearly wavelength independent losses. Our analysis and proposal should serve as a useful design tool to tailor the propagation characteristics of BRWs.
0306-8919
983-993
Pal, Bishnu P.
cfda4b98-9632-4488-b120-d224d3df9650
Ghosh, Somnath
529d51f4-6be1-4815-85e3-560705454f3a
Varshney, R.K.
1aba05ad-4a54-4076-b4a0-f8e9e8b3dee3
Dasgupta, Sonali
43e5e81a-3da3-4ba5-a5f4-2abe6301fc71
Ghatak, Ajoy
f206efd5-52d6-4b40-b644-be52f18fc250
Pal, Bishnu P.
cfda4b98-9632-4488-b120-d224d3df9650
Ghosh, Somnath
529d51f4-6be1-4815-85e3-560705454f3a
Varshney, R.K.
1aba05ad-4a54-4076-b4a0-f8e9e8b3dee3
Dasgupta, Sonali
43e5e81a-3da3-4ba5-a5f4-2abe6301fc71
Ghatak, Ajoy
f206efd5-52d6-4b40-b644-be52f18fc250

Pal, Bishnu P., Ghosh, Somnath, Varshney, R.K., Dasgupta, Sonali and Ghatak, Ajoy (2007) Loss and dispersion tailoring in 1D photonics band gap Bragg reflection waveguides: finite chirped claddings as a design tool. Optical and Quantum Electronics, 39 (12-13), 983-993. (doi:10.1007/s11082-007-9160-y).

Record type: Article

Abstract

We exploit a simple and accurate matrix method to analyze the effects of introducing a linear chirp either in thickness or in refractive index of the cladding layers on the propagation characteristics (loss and dispersion) of 1D photonic band gap planar Bragg reflection waveguides (BRWs). We show that an appropriate chirp in the otherwise periodic claddings of finite extent BRWs could be gainfully exploited to tailor its leakage loss and waveguide dispersion features. In particular, we theoretically demonstrate that for some reported sample BRWs, leakage loss and waveguide dispersion could be significantly reduced by a factor of 30-50 and by about two orders of magnitude, respectively as compared to un-chirped BRWs. Furthermore, we also show that in contrast to un-chirped BRWs, how chirped BRWs could be designed with attractive feature like much less number of cladding layers and nearly wavelength independent losses. Our analysis and proposal should serve as a useful design tool to tailor the propagation characteristics of BRWs.

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More information

Published date: October 2007

Identifiers

Local EPrints ID: 65814
URI: http://eprints.soton.ac.uk/id/eprint/65814
ISSN: 0306-8919
PURE UUID: 0310a313-90c7-4a23-8c87-4ed7abcba56d

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Date deposited: 24 Mar 2009
Last modified: 07 Jan 2022 23:41

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Contributors

Author: Bishnu P. Pal
Author: Somnath Ghosh
Author: R.K. Varshney
Author: Sonali Dasgupta
Author: Ajoy Ghatak

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