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We have developed a widely tunable laser source that uses triple ring resonators with narrow spectral linewidth. A spectral linewidth of less than 100 kHz is obtained for all wavelength channels acros...
A narrow linewidth slotted Fabry-Perot laser has been employed in a self-coherent optical transmission system. A comparison of the system performance of the tunable slotted laser with a SG-DBR laser h...
We showed 100 GHz beat signals and estimated the linewidth of the beat signal. 100 GHz-spaced optical modes were extracted from 12.5 GHz-spaced comb signals. The linewidth was narrower than 1 Hz.
We show experimentally that the signal quality of a self-heterodyne optical OFDM system can be improved by temporally realigning the carrier with the subcarriers before photodetection. This can be exp...
Calibration of tunable lasers is currently based on achieving sufficient SMSR and output power for transmission. As systems employing these devices move towards advanced modulation formats it becomes ...
The linewidth of an improved 40GHz modelocked laser diode is investigated. The influence of its operation parameters on linewidth and the resulting performance in a 40Gbaud-DQPSK system is evaluated.
2.5-Gsymbol/s 64-QAM transmission over 120-km standard-SMF was demonstrated by electronic pre-equalization for ISI supression and pilot-carrier aided optical phase-noise cancelling to obtain the BER o...
In micro-electronic and micro-optical manufacturing, especially in the fabrication of linewidth-variation-sensitive devices, we sometimes care getting stable or precise linewidth rather than creating ...

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