Error-free continuously-tunable delay at 10 Gbit/s in a reconfigurable on-chip delay-line.
A coupled-resonator optical waveguide (CROW) consisting of a chain of directly coupled ring-resonators (RRs) fabricated in 4.5%-indexcontrast silicon oxynitride technology is employed to control the delay of optical pulses with continuity and over several bit-slots. The moderate deterioration of the signal quality versus the delay is demonstrated by the observation of error-free transmission (BER < 10(-9)) at 10 Gbit/s for fractional delays of up to 3 bits, with fractional losses below 1 dB per bit-delay. The high storage efficiency of the device, exceeding 0.5 bit/RR, enables an easy management of the delay and the reduction of the footprint down to 7 mm(2). The presented reconfiguration scheme is hitless with respect to data transmission, since the CROW delay can be tuned without halting the data flow, while preserving the signal quality.
Morichetti
Francesco
F
Dipartimento di Elettronica e Informazione, Politecnico di Milano,Via Ponzio 34/5, 20133 Milano, Italy. morichetti@corecom.it
Melloni
Andrea
A
Ferrari
Carlo
C
Martinelli
Mario
M
D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008872:Microwaves; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D017655:Silicon Compounds / Q000737:chemistry*; D018511:Systems Integration; D013685:Telecommunications / Q000295:instrumentation*; D014159:Transducers; D014732:Vibration
D017655:Silicon Compounds; C032734:silicon nitride