Millimeter-Wave Carrier Embedded Dual-Color Laser Diode for 5G MMW oF Link

Abstract

With the use of central carrier suppressed master which contains a double sideband carrier, a directly encoded dual-color laser diode with low coherence based millimeter-wave (MMW) carrier generation for hybrid wired and wireless MMW over fiber (MMWoF) system is demonstrated. The maximal transmission capacities for optical wired band at 36 Gb/s and for MMW wireless band at 12 Gb/s are achieved in the proposed MMWoF link. Three MMW carrier frequencies of 28, 39, and 47 GHz are synthesized for implementing the fifth generation (5G) mobile network and satellite communication. The dual-color injection-locking effectively suppresses the central carrier power to –37 dBm, which provides the dual-color optical carrier with a central carrier suppression ratio of 38 dB. The 47-GHz double sideband carrier injection has shown its capability to carry 64-QAM OFDM data at 36 Gb/s with the lowest bit-error-rate (BER) of 2.1 × 10–3 over 25-km single-mode fiber, as its weakest four-wave-mixing modes greatly suppress the fiber chromatic dispersion. After optical baseband transmission, the photonic mixed 28-, 39-, and 47-GHz MMW carriers are heterodyne beat from the dual-color carrier to show similar spectral linewidth of 41 dB. The 28-GHz MMW carrier can wireless transmit 12-Gb/s 16-QAM OFDM data over 1.6-m free-space to show an average signal-to-noise ratio of 15.3 dB, an error vector magnitude of 17.1%, and a receiving BER of 3.3 × 10-3.