Apodised Chirped Gratings Using Deep-Ridge Waveguides with Vertical-Groove Surface Gratings

Jun MIYAZU
Toru SEGAWA
Shinji MATSUO
Tetsuyoshi ISHII
Hiroyuki SUZUKI
Yuzo YOSHIKUNI

Publication
IEICE TRANSACTIONS on Electronics   Vol.E88-C    No.7    pp.1521-1522
Publication Date: 2005/07/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.7.1521
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Optoelectronics
Keyword: 
chirped gratings,  apodisation,  reflectivity ripple,  group delay ripple,  

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Summary: 
Apodised chirped gratings based on InGaAsP/InP deep-ridge waveguides with vertical-groove surface gratings were fabricated. Reflectivity ripple and group delay ripple were reduced from around 4 dB to 1 dB and from around 5 ps to 2 ps, respectively, by apodisation over a wavelength range of around 20 nm.