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We developed a new type of EAM-integrated DFB laser that employs both optical absorption and interferometric extinction. And, we achieve a 25.8-Gbit/s 40Gbit/s 40-km transmission with the km novel laser at a modulation voltage of 1 Vpp.
Reliability tests on packaged ultraviolet light-emitting diodes (LEDs) in the ultraviolet-C (UVC) range (< 280 nm) were performed under various temperatures and currents. At higher case temperature, a greater degradation in output power was observed over 1,000 hours. Degradation in output power was also observed at higher operating currents. Some of the output power degradation can be attributed...
A 4×25-Gbit/s EADFB laser array chip monolithically integrated with a cascaded Mach-Zhender multiplexer is developed for CFP4-class 100GbE transmitters for the first time. Our compact TOSA containing this chip satisfies system requirements with semi-cooled operation.
The mechanisms of increased output power and stable single-mode lasing characteristics of novel rear-grating laser are both theoretically and experimentally investigated and its application to uncooled light source is demonstrated for the first time.
A monolithically integrated tunable transmitter consisting of a tunable DFB laser array and a Mach-Zehnder modulator with a 2-channel SOA is demonstrated. The total output power is twice that of the conventional configuration.
We fabricated a compact 10-Gb/s-wavelength tunable laser module by integrating a tunable DFB laser array and an InP-based n-i-n Mach-Zehnder modulator in one package. We developed a multichip assembly technology to realize high optical coupling efficiency and achieved a continuous-wave output power of +6.5 dBm. We demonstrated a full C-band 10-Gb/s optical duobinary transmission with a constant modulation...
Full C-band 200 km optical duobinary transmission with a constant modulation voltage is demonstrated by using a wavelength tunable laser co-packaged with an InP Mach-Zehnder modulator (MZM). We developed a multi-chip assembly technology for high optical coupling efficiency and achieved an output power of +6.5 dBm CW.
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