Bidirectional MM-Wave Radio over Fiber transmission through frequency dual 16-tupling of RF local oscillator

Abstract

In this paper for the first time, a 60 GHz bidirectional Millimeter Wave (MM-Wave) Radio over Fiber (RoF) transmission through a new frequency dual 16-tupling of 3.75 GHz local oscillator (LO) is demonstrated. The proposed system is constructed with parallel combination of two cascaded stages of MZMs. The upper cascaded stage and the Lower cascaded stages are biased at the Maximum Transmission Point (MATP). By suitable adjustments of LO phase and amplitude, optical sidebands with spacing of 8 times the input LO frequency is generated. These sidebands are then separated using filters to achieve dual 16-tupling. A good agreement between numerical derivations and the simulation results are achieved. Further, a simulation is performed to access the dual bidirectional transmission performance for the double and single tone modulation with 2.5 Gbps data transmission. The transmission distance is limited to 25 km for the double tone modulation due to bit walk of effect. A 60 km link distance is achieved with single tone modulation. The dispersion induced power penalties less than 0. 5 dB at 10 −9 BER is observed for both up and down streams.

Performance improved tunable millimeter‐wave signal generation employing UFBG based AOTF with bit walk‐off effect compensation

“…In Equation , D ( t ) denotes the data modulated on the signal and η is the attenuation caused by the data modulation. As the modulated DSB signal passes through an SMF with chromatic dispersion effects, different phase shift in both phase and time have to be suffered by each sideband data, and this forces the data bits to walk off from one another with respect to the length of FMF . In addition to that, when a DSB signal transmits through a fiber, both sidebands possess different velocities.…”

Radio-over-Fiber Dual-Parallel Mach–Zehnder modulator system for photonic generation of Millimeter-Wave signals through two stages

“…In Muthu and Raja (2016) is shown a new low-cost approach to 16-tupling frequency generation was demonstrated through a 60GHz bidirectional RoF system using two parallel cascading MZMs. This system simultaneously supported two base stations with bidirectional data transmission between BS and CS through wavelength reuse, so the connection distance can be extended up to 60km with a power penalty of 0.5dB and BER of -9 for both the upstream signal and the downstream signal.…”

Large Tunable 16-Tupled Millimeter Wave Generation Utilizing Optical Carrier Suppression With a Tunable Sideband Suppression Ratio

“…Recently, several generation techniques have been reported with a 16 FMF utilizing a two-cascaded dual parallel MZM configuration [6][7][8], parallel combination of two cascaded MZM [9], cascaded parallel MZM [10,11], and a feedforward modulation [12]. Dongfei wang [13] proposed a generation method with a two-cascaded MZM but with a higher modulation index (>>7) requiring a high voltage radio frequency signal which in turn increases the system sensitivity.…”