Space-qualifying silicon photonic modulators and circuits.

Autor:	Mao D; Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA.; II-VI Incorporated, 48800 Milmont Drive, Milmont, CA 94538, USA., Chang L; Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA., Lee H; Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA., Yu AW; NASA Goddard Space Flight Center, Lasers and Electro-Optics Branch, Greenbelt, MD 20771, USA., Maruca BA; Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA., Ullah K; Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA., Matthaeus WH; Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA., Krainak MA; NASA Goddard Space Flight Center, Lasers and Electro-Optics Branch, Greenbelt, MD 20771, USA., Dong P; II-VI Incorporated, 48800 Milmont Drive, Milmont, CA 94538, USA., Gu T; Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA.
Jazyk:	angličtina
Zdroj:	Science advances [Sci Adv] 2024 Jan 05; Vol. 10 (1), pp. eadi9171. Date of Electronic Publication: 2024 Jan 05.
DOI:	10.1126/sciadv.adi9171
Abstrakt:	Reducing the form factor while retaining the radiation hardness and performance matrix is the goal of avionics. While a compromise between a transistor's size and its radiation hardness has reached consensus in microelectronics, the size-performance balance for their optical counterparts has not been quested but eventually will limit the spaceborne photonic instruments' capacity to weight ratio. Here, we performed space experiments of photonic integrated circuits (PICs), revealing the critical roles of energetic charged particles. The year-long cosmic radiation exposure does not change carrier mobility but reduces free carrier lifetime, resulting in unchanged electro-optic modulation efficiency and well-expanded optoelectronic bandwidth. The diversity and statistics of the tested PIC modulator indicate the minimal requirement of shielding for PIC transmitters with small footprint modulators and complexed routing waveguides toward lightweight space terminals for terabits communications and intersatellite ranging.
Databáze:	MEDLINE
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