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DAC-Less 32-GBd PDM-256-QAM Using Low-Power InP IQ Segmented MZM

 
: Aimone, A.; Frey, F.; Elschner, R.; Lopez, I.G.; Fiol, G.; Rito, P.; Gruner, M.; Ulusoy, A.C.; Kissinger, D.; Fischer, J.K.; Schubert, C.; Schell, M.

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IEEE Photonics Technology Letters 29 (2017), Nr.2, S.221-223
ISSN: 1041-1135
Bundesministerium für Bildung und Forschung BMBF
16BP12501
Bundesministerium für Bildung und Forschung BMBF
16KIS0479
Bundesministerium für Bildung und Forschung BMBF
13N13748
Englisch
Zeitschriftenaufsatz
Fraunhofer HHI ()

Abstract
We demonstrate DAC-less generation and transmission of 256-quadrature amplitude modulation signals at a symbol rate of 32 GBd using an indium phosphide segmented Mach-Zehnder modulator with 15 active sections and dedicated BiCMOS driver arrays. The linear quantization characteristic of the segmented modulator with 4-bit resolution allows the generation of spectrally efficient modulation formats without any transmitter side signal processing. The chip power consumption of 1.64 W translates into the record-low energy per bit of 6.4 pJ/b. Back-to-back performance is evaluated and two different low-density parity check codes enable error-free transmission over 80 and 120 km with a net data rate of 320 and 240 Gb/s, respectively.

: http://publica.fraunhofer.de/dokumente/N-480877.html