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Apodised Chirped Gratings Using Deep-Ridge Waveguides with Vertical-Groove Surface Gratings
Jun MIYAZU Toru SEGAWA Shinji MATSUO Tetsuyoshi ISHII Hiroyuki SUZUKI Yuzo YOSHIKUNI
IEICE TRANSACTIONS on Electronics
Publication Date: 2005/07/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
chirped gratings, apodisation, reflectivity ripple, group delay ripple,
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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.