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Performance evaluation of a transistor-laser-based fibre-optic communication link

R. RAMYA1,2,* , S. PIRAMASUBRAMANIAN2, M. GANESH MADHAN2, A. SAFANA AMALA YAZHINI2

Affiliation

  1. Department of Electronics and Communication Engineering, Sri Sai Ram Engineering College, Chennai, 600044, India
  2. Department of Electronics Engineering, MIT Campus, Anna University, Chennai, 600044, India

Abstract

This work investigates the digital modulation performance of a 1.3 μm transistor laser (TL) with two quantum wells in a single-mode fiber optic link. Utilizing three-level coupled rate equations solved via the Runge–Kutta method, the TL exhibits a threshold current of 1 mA, a modulation bandwidth of 17.8 GHz, and a resonant frequency of 7.6 GHz at a 20mA bias current. Numerical simulations incorporating Langevin noise for 64-bit NRZ transmission demonstrate that the system achieves an acceptable bit error rate (BER) of 10^(-10) at a 5 Gbps data rate over a maximum fiber length of 15 km. These results highlight the TL as a superior optoelectronic device for digital data transmission, offering enhanced extinction ratio, Q-factor, and BER performance compared to traditional laser diodes..

Keywords

Transistor Laser (TL), numerical simulation, Extinction Ratio (ER), Q factor, Bit Error Rate (BER).

Submitted at: Jan. 18, 2026
Accepted at: Oct. 5, 2026

Citation

R. RAMYA, S. PIRAMASUBRAMANIAN, M. GANESH MADHAN, A. SAFANA AMALA YAZHINI, Performance evaluation of a transistor-laser-based fibre-optic communication link, Journal of Optoelectronics and Advanced Materials Vol. 28, Iss. 9-10, pp. 450-463 (2026)