An ultrawide tunable range single passband microwave photonic filter based on stimulated Brillouin scattering

Abstract

A single passband microwave photonic filter with ultrawide tunable range based on stimulated Brillouin scattering is theoretically analyzed. Combining the gain and loss spectrums, tuning range with 44GHz is obtained without crosstalk by introducing two pumps. Adding more pumps, Tuning range multiplying with the multiplication factor equaling to the total quantity of pump can be achieved, which has potential application in microwave and millimeter wave wireless communication systems.

Tunable and reconfigurable single passband filter using stimulated Brillouin scattering and intensity modulation

“…The interaction between the probe signal and Stocks wave occurs in fiber, causing an amplification in the SBS gain spectrum region and an attenuation in the SBS loss spectrum region, which can be described as 13,24 gðfÞ The interaction between the probe signal and Stocks wave occurs in fiber, causing an amplification in the SBS gain spectrum region and an attenuation in the SBS loss spectrum region, which can be described as 13,24 gðfÞ…”

Multiple microwave frequencies measurement based on stimulated Brillouin scattering with ultra-wide range

“…So we can obtain two pumps which have a space of 2V B with same amount of power. Then during SBS process the loss spectrum of pump 1 can be fully compensated by the gain spectrum of pump 2 [14,15]. That is to say, the spectral space between gain and loss region is broadened to 4V B .…”

Ultraflat Widely Tuned Single Bandpass Filter Based on Stimulated Brillouin Scattering

“…Although the scheme presents wide tuning range, the usage of two independent optical sources introduces the instability of radio frequency (RF) responses. Brillouin gain and loss have been used in [14]- [16]. However these structures have limited tunability as it requires both matched frequency intervals and dual-wavelength pump.…”