All-optical data format conversion in synchronously modulated single-mode Fabry-P?rot laser diode using external injection-locking-induced nonlinear threshold reduction effect
Journal
IEEE Photonics Technology Letters
Journal Volume
17
Journal Issue
6
Pages
1307-1309
Date Issued
2005
Author(s)
Abstract
High-speed all-optical data-format conversion and logic gate from a synchronously modulated Fabry-Pe/spl acute/rot laser diode (FPLD) below threshold condition is demonstrated by using external injection-induced nonlinear threshold reduction effect of the FPLD. A pulsed pseudoreturn-to-zero (PRZ) data with maximum extinction ratio of 14.5 dB is obtained by externally seeding the 9.953-Gb/s (OC-192) nonreturn-to-zero (NRZ) data stream to optically gain-switch the FPLD. At optimized radio frequency and optical injecting powers of 24 and 4 dBm, the root mean square timing jitter and the duty-cycle (pulsewidth) of the PRZ eye pattern are determined as 0.4 ps and 45% (44 ps), respectively. The bit-error rate (BER) can be as low as 10/sup -13/ under the 4-dBm external injecting power. A 1.5-dB power penalty with the BER of <10/sup -9/ is measured at a bit rate of 9.953 Gb/s. Highest NRZ-to-PRZ conversion rate of 12.5 Gb/s is achieved by increasing biasing current of the FPLD.
Type
journal article