Fig. 15: Schematics of OPA chips heterogeneously integrated on the III/V-on-SOI platform.

a–c Heterogeneously-integrated III/V-on-SOI OPAs developed by USCB with tunable lasers²⁹, on-chip calibration³⁰, and III/V phase shifters²⁷; (d) Similar 32-channel chip demonstrated by Samsung⁹⁴.