[Th-P2-F] Semiconductor Cryo-Technology and Novel Qubits

4:30 PM - 4:45 PM JST(7:30 AM - 7:45 AM UTC)

[Th-P2-F-03] Ultralow-Threshold, Single-Mode VCSELs for Scalable Cryogenic Interconnects

〇Behzad Namvar^1,2, Patrik Rajala¹, Teemu Hakkarainen¹, Mircea Guina¹, Jukka Viheriälä² (1. Optoelectronics Res Centre, Faculty of Eng and Natural Sci, Tampere Univ (Finland), 2. Advanced Microelectronics Packaging Group, Faculty of Info Tech and Communication Sci, Tampere Univ (Finland))

We present an intra-cavity contacted (ICC) VCSEL optimized for 4 K operation, achieving a 150 µA threshold and 25.6 dB SMSR. Designed for cryogenic optical interconnects, the device compensates for internal heating via precise gain-cavity detuning, ensuring high-speed, single-mode performance from RT down to 5 K.