Speed Enhancement of a Single-Mode FP-LD-Based Switch Using the Weak-Lock Technique

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A technique called weak-lock (WL) has been proposed and applied to a simple optical on/off switch to increase its working speed from 1 to 12 Gb/s with clear output waveforms, whereas the required injection power is decreased. The switch is based on the injection-locking property of a single-mode Fabry-Perot laser diode (SMFP-LD). Unlike the case of full-lock (FL) in which self-locked mode and all side modes of the SMFP-LD are fully suppressed due to high injected input power, in the WL case, the injection power is gradually decreased as if the SMFP-LD's self-locked mode is still maintained. It was observed that the output waveform's rising edge, taken at the self-locked mode's wavelength after the filter, in the WL case is clean at speed of 12 Gb/s compared to the blur and noisy rising edge in the FL case even at much lower speed (1 Gb/s). In summary, the WL technique shows advantages compared to the conventional FL technique in terms of lower injection power and higher on/off switching speed.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2014-08
Language
English
Article Type
Article
Keywords

PEROT LASER-DIODE; SEMICONDUCTOR OPTICAL AMPLIFIER; CAVITY; MODULATION; CONVERSION

Citation

IEEE PHOTONICS JOURNAL, v.6, no.4

ISSN
1943-0655
DOI
10.1109/JPHOT.2014.2331257
URI
http://hdl.handle.net/10203/189847
Appears in Collection
EE-Journal Papers(저널논문)
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