"Ideal" optical delay lines based on tailored-coupling and reflecting, coupled-resonator optical waveguides
- Creators
- Liu, Hsi-Chun
- Yariv, Amnon
Abstract
We present a design of "ideal" optical delay lines (i.e., constant amplitude and constant group delay over the desired bandwidth). They are based on reflection from coupled-resonator optical waveguides (CROWs). The inter-resonator coupling coefficients are tailored and decrease monotonically with the distance from the input to realize all-pass Bessel filters. The tailored coupling coefficients result in a frequency-dependent propagating distance which compensates for the group velocity dispersion of CROWs. We present a simple formalism for deriving the time-domain coupling coefficients and convert these coefficients to field coupling coefficients of ring resonators. The reflecting CROWs possess a delay-bandwidth product of 0.5 per resonator, larger than that of any kind of transmitting CROW. In the presence of uniform gain, the gain enhanced by slow light propagation and the constant group delay result in efficient and dispersion-free amplifiers.
Additional Information
© 2012 Optical Society of America. Received November 24, 2011; revised February 1, 2012; accepted February 11, 2012; posted February 13, 2012 (Doc. ID 158806); published May 25, 2012. This work was supported by the National Science Foundation and the Army Research Office.Attached Files
Published - Liu2012p18747Opt_Lett.pdf
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Additional details
- Eprint ID
- 32336
- Resolver ID
- CaltechAUTHORS:20120710-150216419
- NSF
- Army Research Office (ARO)
- Created
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2012-07-12Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field