Subject of study. A high-speed fiber-optic transmitter for the spectral range of 1.55 mu m, based on a vertical-cavity surface-emitting laser (VCSEL) fabricated using wafer fusion technology was investigated. Aim of study. A compre-hensive study of the parameters of the 1.55-mu m range optical transmitter based on a VCSEL at room temperature is presented. Method. The heterostructure of the VCSEL was fabricated using molecular beam epitaxy and wafer fusion technology. The transmitter parameters were investigated with current modulation by a large signal in the non-return-to-zero (NRZ) format. Main results. At 20 degrees C, the transmitter demonstrated maximum output optical power, exceeding 1 mW at the fiber output in single-mode operation. The maximum data rate over a short commu-nication line based on an SMF-28 fiber with current amplitude modulation in the NRZ format reached 30 Gbits/s, limited by the modulation bandwidth reaching a value of approximately 12 GHz (at -3 dB level). With an increase in the length of the fiber-optic communication line, the chromatic dispersion of the fiber and the chirp effect of the laser increase inter-symbol interference, which ultimately limits the speed and range of optical data transmis-sion. Practical significance. The investigated fiber-optic transmitters are promising for both digital and analog transmission of high-frequency optical signals over fiber-optic communication lines.(c) 2023 Optica Publishing Group
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