Active Integrated Filters for RF-Photonic Channelizers

A theoretical study of RF-photonic channelizers using four architectures formed by active integrated filters with tunable gains is presented. The integrated filters are enabled by two- and four-port nano-photonic couplers (NPCs). Lossless and three individual manufacturing cases with high transmission, high reflection, and symmetric couplers are assumed in the work. NPCs behavior is dependent upon the phenomenon of frustrated total internal reflection. Experimentally, photonic channelizers are fabricated in one single semiconductor chip on multi-quantum well epitaxial InP wafers using conventional microelectronics processing techniques. A state space modeling approach is used to derive the transfer functions and analyze the stability of these filters. The ability of adapting using the gains is demonstrated. Our simulation results indicate that the characteristic bandpass and notch filter responses of each structure are the basis of channelizer architectures, and optical gain may be used to adjust filter parameters to obtain a desired frequency magnitude response, especially in the range of 1–5 GHz for the chip with a coupler separation of ∼9 mm. Preliminarily, the measurement of spectral response shows enhancement of quality factor by using higher optical gains. The present compact active filters on an InP-based integrated photonic circuit hold the potential for a variety of channelizer applications. Compared to a pure RF channelizer, photonic channelizers may perform both channelization and down-conversion in an optical domain.

[1]  K. Williams,et al.  Microwave photonics , 2002 .

[2]  Jian Tong,et al.  Active integrated photonic true time delay device , 2006, IEEE Photonics Technology Letters.

[3]  J. Goodman,et al.  Fiber-optic lattice signal processing , 1984, Proceedings of the IEEE.

[4]  Thomas Edward Darcie,et al.  Differential frequency-deviation multiplexing for lightwave networks , 1989 .

[5]  A.J. Seeds,et al.  Microwave Photonics , 2006, Journal of Lightwave Technology.

[6]  R. A. Minasian,et al.  Photonic signal processing of microwave signals using an active-fiber Bragg-grating-pair structure , 1997 .

[7]  A. Mitchell,et al.  A microwave channelizer and spectroscope based on an integrated optical Bragg-grating Fabry-Perot and integrated hybrid Fresnel lens system , 2006, IEEE Transactions on Microwave Theory and Techniques.

[8]  J. Mork,et al.  Slow Light in a Semiconductor Waveguide for True-Time Delay Applications in Microwave Photonics , 2007, IEEE Photonics Technology Letters.

[9]  Robert A. Minasian,et al.  Microwave optical filters using in-fiber Bragg grating arrays , 1996 .

[10]  Gregory P. Nordin,et al.  Compact 90° trench-based splitter for silicon-on-insulator rib waveguides , 2007 .

[11]  Duncan L MacFarlane,et al.  Extended lattice filters enabled by four-directional couplers. , 2004, Applied optics.

[12]  Marc P Christensen,et al.  Integrated photonic coupler based on frustrated total internal reflection. , 2008, Applied optics.

[13]  A. Leven,et al.  Analog RF Performance of a CMOS Optical Filter , 2006, 3rd IEEE International Conference on Group IV Photonics, 2006..

[14]  Viswanath Ramakrishna,et al.  Extended active optical lattice filters: filter synthesis. , 2010, Journal of the Optical Society of America. A, Optics, image science, and vision.

[15]  Tae Wook Kim,et al.  Initial surface reactions of atomic layer deposition , 2009 .

[16]  Viswanath Ramakrishna,et al.  Extended active tunable optical lattice filters enabled by four-dimensional couplers: systems modeling. , 2009, Journal of the Optical Society of America. A, Optics, image science, and vision.

[17]  Eric M. Dowling,et al.  Lightwave lattice filters for optically multiplexed communication systems , 1994 .

[18]  Wei Zhou,et al.  HBr-based inductively coupled plasma etching of high aspect ratio nanoscale trenches in GaInAsP∕InP , 2008 .

[19]  Ming C. Wu,et al.  Characterization of a coherent optical RF channelizer based on a diffraction grating , 2001 .

[20]  Kun-Yii Tu,et al.  Silicon RF-Photonic Filter and Down-Converter , 2010, Journal of Lightwave Technology.

[21]  E. Dowling,et al.  Z-DOMAIN TECHNIQUES IN THE ANALYSIS OF FABRY-PEROT ETALONS AND MULTILAYER STRUCTURES , 1994 .

[22]  William S. Rabinovich,et al.  Silicon-on-insulator integrated waveguide filters for photonic channelizer applications , 2009, 2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference.