A TUNABLE PHOTONIC MICROWAVE NOTCH FILTER USING A MULTIPLE WAVELENGTH OPTICAL SOURCE

作者：Choi Yong Kyu; Jeon Sie Wook; Kim Youngbok; Oh Choong Keun; Park Chang Soo^*

来源：Microwave and Optical Technology Letters, 2010, 52(1): 134-138.

DOI：10.1002/mop.24841

• tunable notch filter
• self-injection locked optical source
• reflective semiconductor optical amplifier
• fiber Bragg grating
• microwave photonics

We propose a tunable photonic microwave notch filter using a multi-wavelength optical source. Two peak wavelengths are generated using a reflective semiconductor optical amplifier (RSOA) self-injection, locked by two external fiber Bragg gratings (FBGs). The time delay required for the notch filter is obtained based on the wavelength-dependent propagation velocity through the fiber. The tunable filter characteristic is obtained by changing the center wavelength of one of the gratings and its tunability is limited only by the gain profile of the RSOA and the tuning range of the grating. Based on the proposed structure, a two-tap microwave notch filter with free spectral range tunable from 1.15 to 5.79 GHz is experimentally demonstrated.

• 出版日期2010-1