Photonic microwave notch filter using cross polarization modulation in highly nonlinear fiber and polarization-dependent optical delay in high birefringence fiber

Abstract

A novel photonic microwave notch filter with both negative and positive coefficients is proposed and demonstrated using a single optical source. These coefficients are generated in a highly nonlinear fiber by cross polarization modulation effect and guided through a high birefringence fiber, and finally detected. Due to the orthogonal polarity between the two coefficients, the proposed filter has a stable transfer response and no resonance peaks at baseband. The experimental results showed a stable notch filter characteristic with the free spectral range of 3.97 GHz over the range of 15 GHz.

The study of an ultrawide tunable range single passband microwave photonic notch filter

“…A c c e p t e d M a n u s c r i p t There are quite a number of microwave photonic notch filter structure has been reported [4][5][6][7][8][9] . Using a single light source, the frequency response is flat , but with a relatively small tuning range [ 4 ].…”

“…Using a single light source, the frequency response is flat , but with a relatively small tuning range [ 4 ]. A tunable microwave photonic notch filter based on Silicon ring resonator has been reported, its tuning is performed by heating, and the whole system requires a complex structure to keep the thermal stability [ 5 ] .…”

Microwave Photonic Notch Filter With Complex Coefficient Based on DDMZM

“…In order to implement high-pass or bandpass MPF, negative coefficient is required [5]- [10]. MPFs with negative coefficient can be realized based on such as phase inversion in an electro-optic modulator [5], [6], cross polarization modulation in a highly nonlinear fiber [7], or phase-to-intensity modulation conversion in a dispersive element [8]. It is noted that MPFs with positive or negative coefficients suffer from inherent limitation of tunability.…”

Ultrawideband pulse generation using hybrid photonic microwave filters

“…2 Recently, great interest in photonic microwave filtering technique has arisen, which can process high-frequency microwave signals in the optical domain. [11][12][13] However, to the best of our knowledge, there has been no attempt to generate multiband UWB pulses by using photonic microwave filters.…”