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Photonic generation of ultrawideband signals based on frequency-dependent gain saturation in a reflective semiconductor optical amplifier |
Optics Letters, Vol. 37, Issue 20, pp. 4251-4253 (2012)
http://dx.doi.org/10.1364/OL.37.004251
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Abstract
A novel scheme to generate ultrawideband (UWB) pulses with different polarities is proposed and experimentally demonstrated based on a reflective semiconductor optical amplifier (RSOA). Because the gain saturation in the RSOA is more evident when the injected optical signal has a lower modulation frequency, the RSOA operated at the gain saturation regime can shape a dark or bright return-to-zero pulse to a UWB pulse. An experiment is performed. The fractional bandwidth of the generated UWB pulse is more than 89%. The generated UWB signals with on-off keying format are transmitted in a 20 km single-mode fiber. The power penalty is less than 1.2 dB. Since the RSOA is possibly a key device in wavelength-division multiplexed passive optical networks (WDM-PONs), the proposed optical UWB generator can be used to provide UWB services in a WDM-PON system without significantly increasing the cost.
© 2012 Optical Society of America
OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(060.5625) Fiber optics and optical communications : Radio frequency photonics
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: July 17, 2012
Revised Manuscript: September 1, 2012
Manuscript Accepted: September 6, 2012
Published: October 9, 2012
Citation
Gang Chen and Shilong Pan, "Photonic generation of ultrawideband signals based on frequency-dependent gain saturation in a reflective semiconductor optical amplifier," Opt. Lett. 37, 4251-4253 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-20-4251
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