We present the transponder design and verification to obtain over 10 Gbit/s capability for an optical feeder link. The transponder employing a transmitter and a receiver supports differential phase shift keying (DPSK) optical communication. In order to provide receiver stability against optical power fluctuations, we utilize the terrestrial technology and devices such as clock data recovery (CDR), a hard-decision forward error correction (FEC) and temperature control of delay line interferometer (DLI) to realize the enhancement of dynamic range of received optical power. We have also investigated reliability of terrestrial devices including photonics integration circuit (PIC) type DLI and CDR for satellites.
Adoption of terrestrial optical communication devices are effective to realize a free-space optical communication technology for satellite use earlier. However, the quality assurance level of terrestrial optical communication devices has not generally been reached for satellite use. In this paper, we described a screening test method to update the quality assurance level of optical communication devices for satellite use.
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