Title :
Integrated resonance-enhanced variable optical delay lines
Author :
Rasras, Mahmoud S. ; Madsen, Christi K. ; Cappuzzo, Mark A. ; Chen, Evans ; Gomez, Lou T. ; Laskowski, Edward J. ; Griffin, Andrew ; Wong-Foy, Annjoe ; Gasparyan, Arman ; Kasper, Albin ; Le Grange, Jane ; Patel, Sanjay S.
Author_Institution :
Lucent Technol. Bell Labs., Murray Hill, NJ, USA
fDate :
4/1/2005 12:00:00 AM
Abstract :
A wide-tuning-range optical delay line is demonstrated in high (2%) index contrast waveguides. This device integrates four-stage ring resonator all-pass filters (APFs) with cascaded fixed spiral-type delay waveguides; each fixed delay path varies in length by a factor of two from the previous stage. A 2×2 switch separates each fixed delay and the tunable parts of the delay line. The APF allows for continuous delay tuning. This device enables coherent switching and continuous tuning ranges up to 2.56 ns.
Keywords :
all-pass filters; integrated optics; optical communication equipment; optical crosstalk; optical delay lines; optical design techniques; optical fabrication; optical filters; optical resonators; optical switches; optical tuning; optical waveguides; cascaded fixed spiral-type delay waveguides; coherent switching; four-stage ring resonator all-pass filters; integrated resonance-enhanced variable optical delay lines; Delay lines; Integrated optics; Optical buffering; Optical filters; Optical ring resonators; Optical switches; Optical tuning; Optical waveguides; Propagation delay; Resonance; All-pass filters (APFs); group delay; optical delay lines; optical waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.844009
