Mitsubishi Electric Develops World’s First Monolithically Integrated Laser Diode for 43Gbps RZ-DQPSK Transmission


Mitsubishi Electric has developed world’s first fully monolithically integrated laser diode for use in transmission devices that transmits large date volumes between metropolitan areas at 43 giga-bits per second (Gbps) in a method called Return to Zero Differential Quadrature Phase Shift Keying (RZ-DQPSK). Consisting of a tunable laser array, an RZ Mach-Zehnder modulator and a DQPSK Mach-Zehnder modulator, this new laser diode achieves tuning control over the range of 95channels at 40nm in standard set by the 50-GHz International Telecommunication Union Telecommunication Standardization Sector (ITU-T).


This breakthrough by Mitsubishi Electric will be presented at the Optical Fiber Communication Conference 2011 (OFC 2011) scheduled to be held at the Los Angeles Convention Center in Los Angeles, CA on March 610, 2011.




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