The Study of Optical Beating Techniques Using Nonlinear Fiber in Millimeter-Wave over Fiber Systems

Because the requirement of transmission data rates is more increasing for wireless communication system in recent years, and the current bandwidth is not enough to use nowadays, many researchers have started to study how to get higher frequency band called millimeter wave. There are several methods have been proposed to generate and transmit millimeter wave like Mach-Zehnder Modulator (MZM) millimeter wave technique and dual-wavelength mode-locked laser millimeter wave technique, many of them use optical fiber to transmit millimeter wave because the high attenuation in air. MZM millimeter wave technique is a very common method to generate millimeter wave because the advantage of directly carrying the signal wave using modulator, less chirp effect, the ability of harmonic wave suppression, acceptable for low power and so on. But it also has some disadvantages like limited ability from the ability of MZM, expensive cost, have to cascade more than one MZM to generate higher frequency. This plan has an idea to generate millimeter wave utilizing the nonlinear phenomenon of highly nonlinear optical fiber (HNLF), like four-wave mixing (FWM) and self-phase modulation (SPM). The concept is put the fiber in a loop or linear cavity by FBG and stimulate nonlinear phenomenon by combing the input frequency and the frequency trapped in the cavity. This kind of structure has some advantages like easy to build, easy to control the harmonic wave, can generate higher frequency millimeter wave that current MZM can’t achieve. We will construct this structure and compare to the MZM and dual-wave mode-lock laser millimeter wave technique for some important factors like bit error rate, stability and so on.

Project ID:PB10401-0085
External Project ID:NSC102-2221-E182-065-MY3