Research on 10Gbps Space Balanced Photodetector Based on Metallized Fiber Resistance Welding Technology

  
  Ms. Zhen Ma

  Deputy Director, Manufacturing Center, Xi ’ an Branch, China Academy of Space Technology，Academy of Space Electronic Information Technology Xi’an, China

Abstract:

To address the stringent requirements for high-reliability packaging of balanced photodetectors in space coherent laser communications, a 10Gbps balanced photodetector based on metallized fiber resistance welding technology was developed. Sub-micron precision alignment was achieved through a six-degree-of-freedom automated platform. A localized resistance welding process for metallized fibers was proposed as an all-metal packaging solution to replace traditional adhesive bonding, effectively eliminating optical path offsets caused by organic material outgassing and welding thermal stress. Experimental results demonstrate that the chip mounting void rate is less than 10%, the responsivity exceeds 0.7 A/W (@1550nm), and the optical power fluctuation across the full temperature range is less than 0.25 dB. The device successfully passed space-grade environmental tests, including thermal vacuum cycling and random vibration, verifying the long-term reliability of the process. This research provides a viable technical path for the localization and engineering application of high-reliability, high-speed space optoelectronic detectors.

Speaker's Biography: 

The 18th China Young Female Scientist Award Recipient Senior Technical Expert, China Aerospace Science and Technology Corporation (CASC) Affiliated to the Electrical Assembly Process Technology Division and Precision Optical Component Manufacturing Technology Center of CASC Member, Electronic Assembly Materials Technical Committee, Electronic Materials Subcommittee, China Materials and Test Standards Consortium Her research has long focused on high-end aerospace electronic assembly and precision optical manufacturing technologies. Her core research directions cover laser application processes, design and process implementation of microwave active and digital integrated systems. She boasts extensive theoretical knowledge and substantial engineering practice experience in aerospace electronic manufacturing processes.