Girish P. Saraph

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Research Interests

  • RF Electronics & Wireless Com.
  • Communication Networks
  • High Power Microwave Sources & Radars
  • Fiber Optics & Optical Networks

Details of research activity

Courses Offered

Academic Background

  • Ph.D. University of Maryland, College Park, U.S.A. Dec. 1994 (Degree awarded: May 1995)

Work Experience

  • 1995-1997 Assistant Research Scientist, University of Maryland, College Park, Maryland, USA.
  • 1997-2000 Senior Engineer, CPI (Microwave & Wireless Division), Palo Alto, California, USA.

Contact Information

Department of Electrical Engineering
IIT Bombay, Powai
Mumbai 400 076, India
Email : girishs[AT]ee.iitb.ac.in
Phone (Internal(O)) : (0091 22) - 2576 7410
Office room no: 143
Fax: (0091 22) - 25723707

List of Publications

Publications in Scientific Meetings / Conferences
  1. “Diffserv over MPLS : Tuning QOS parameters for converged traffic using linux traffic control”, Sundeep B. Singh and Girish P. Saraph. NCC 2006.
  2. “Implementation of scalable ethernet bridge with Auto-dioscovery and Auto-updates using network processor”, H.P.Shringarpure, G.P.Saraph and D. Majumdar, NCC 2006.
  3. “Highly Scalable and Dynamic traffic engineering scheme for MPLS Networks”, Girish P. Saraph, MPLS world congress 2005.
  4. “Converged communication Networks”, Girish P. Saraph, Elitex 2005.
  5. “Implementation and performance evaluation of packet forwarding scheme based on VS routing scheme on the network processor platform”, Darshan V. Mujumdar, Himanshu P. Shringarpure and Girish P. Saraph, INTEL IXA Education Summit 2005, Hudson, Massachusetts, USA.
  6. “Traffic Engineering using New VS Routing Scheme”, G. P. Saraph and P. Singh, IEEE International Conference on Communications (ICC 2004), Paris, June 2004.
  7. “Performance Analysis of New VS Routing using Network Simulator”, R. Aggrawal and G. P. Saraph, (to be submitted), 2004.
  8. “Spread Spectrum based Modular Wireless Link Set-up at 2.4 GHz”, S. Govardhan, A. Punia, R. Kanwar, Girish Kumar and G. P. Saraph, 10th National Conference on Communications (NCC 2004), Bangalore, Jan-Feb. 2004.
  9. “Generalized Scattering Matrix Treatment for Optical Structures”, S. Mehrotra, R. Kumbhare, and G. P. Saraph, 10th National Conference on Communications (NCC 2004), Bangalore, Jan-Feb. 2004.
  10. “Design of Broadband Klystron Output Circuits”, H. A. Soman, G. P. Saraph, and B. M. Baveja, International Radar Symposium of India 2003 (IRSI-2003), Bangalore, Dec. 2003.
  11. “Telemetry System for Navigational Aids”, T. V. K. Sushil kumar and G. P. Saraph, International Radar Symposium of India 2003 (IRSI-2003), Bangalore, Dec. 2003.
  12. “New Scheme for IP Routing and Traffic Engineering”, G. P. Saraph and P. Singh, High Performance Switching and Routing Conf. (HPSR-2003), Torino, Italy, June 2003.
  13. “Simulation of IP over ATM over SONET Layered Architecture”, V. Shah and G. P. Saraph, 9th National Conference on Communications (NCC 2003), Chennai, Feb. 2003.
  14. “Scattering Matrix Treatment of Microwave and Optical Devices”, S. Mehrotra, G. P. Saraph, and P. Singh, Photonics 2002, P2.54, T.I.F.R., Mumbai, Dec. 2002.
  15. “IP over ATM over SONET Implementation”, V. Shah and G. P. Saraph, Academia Industry Meet (AIM 2002), I.I.T., Mumbai, Jun. 2002.
  16. “HFSS Simulation of Broadband Klystron Output Circuits”, H. A. Soman and G. P. Saraph, 8th National Conference on Communications (NCC 2002), Mumbai, p. 296, Jan. 2002.
  17. “Advanced Concepts in Broadband Klystron Amplifiers for Radar Applications”, (Invited Paper), G. P. Saraph, International Radar Symposium India 2001 (IRSI-2001), Bangalore, p. 507, Dec. 2001.
  18. “Optical Multiplexers and Switches in Fiber Optic Networks”, G. P. Saraph, (Invited Talk), India Telecom 2001 Conference, Mumbai, Oct. 2001.
  19. “Design and Analysis of High-power, Narrow-band Klystron Amplifier for Driving Accelerators”, G. P. Saraph, (Invited Talk), National Workshop on Microwave & Millimeter Wave Active Devices and their Applications, CEERI, Pilani, Dec. 2000.
  20. “Simulation Studies of Relativistic Gyroklystron Amplifiers”, G. P. Saraph, J. P. Anderson, W. Lawson, and V. L. Granatstein, IEEE Int. Conf. on Plasma Science, May 1997.
  21. “Design of an Advanced Concept Gyroklystron”, J. P. Anderson, W. Lawson, and G. P. Saraph, APS Division of Plasma Phys. Meeting, Nov.1996.
  22. “Gyroklystrons for Driving Linear Colliders at 35 GHz”, V. L. Granatstein, G. P. Saraph, G. S. Nusinovich, A. Singh, and W. Lawson, 7th Advanced Accelerator Concepts (AAC’96) Workshop, Oct.1996.
  23. “Designs of Harmonic Gyroklystron Amplifiers for Linear Accelerators”, G. P. Saraph, W. Lawson, J. P. Anderson, and V. L. Granatstein, 21st Int. Conf. on Infrared and Millimeter Waves, July 1996.
  24. “Gyrotron Amplifiers for Driving Multi-TeV Colliders at Microwave Wavelengths < 1 cm”, V. L. Granatstein, G. P. Saraph, G. S. Nusinovich, and W. Lawson, Snowmass 1996: New Directions for High Energy Physics, June 1996.
  25. “Experimental Designs of Two 150 MW Coaxial Gyroklystrons”, W. Lawson, M. Castle, J. Cheng, B. Hogan, G. P. Saraph, J. P. Calame, and V. L. Granatstein, 21st Int. Conf. on Infrared and Millimeter Waves, July 1996.
  26. “Efficient, 100-160 MW, X- and Ku-band Gyroklystron Amplifier Designs for Linear Colliders”, G. P. Saraph, W. Lawson, J. P. Anderson, M. Castle, and V. L. Granatstein, IEEE Int. Conf. on Plasma Science, June 1996.
  27. “Modeling of High Power Gyrotrons: Comparison with Experiments”, B. Levush, T. M. Antonsen, S. Y. Cai, and G. P. Saraph, IEEE Int. Conf. on Plasma Science, June 1996.
  28. “Designs of Three-cavity, Co-axial Gyroklystron Amplifiers Operating at Fundamental, Second, and Fourth Harmonics”, G. P. Saraph, W. Lawson, P. E. Latham, J. Cheng, M. Castle, J. P. Calame, G. S. Nusinovich, M. Reiser, and V. L. Granatstein, 20th Int. Conf. on Infrared and Millimeter Waves, Dec.1995.
  29. “Development of 100-150MW Gyroklystron Amplifiers in X- and Ku-Band”, J. P. Calame, W. Lawson, B. Hogan, J. Cheng, M. Castle, G. P. Saraph, V. L. Granatstein, and M. Reiser, 37th Annual Meeting, APS Division of Plasma Physics, Nov.1995.
  30. “A Study of Parametric Instability in a Harmonic Gyrotron: Designs of Third Harmonic Gyrotrons at 94GHz and 210GHz (Effect of Velocity Spread)”, G. P. Saraph, B. Levush, T. M. Antonsen, and G. S. Nusinovich, (Invited Talk), IEEE Int. Conf. on Plasma Science, p.61, June 1995.
  31. “Designs of Three-cavity, Co-axial Gyroklystron Circuits for Linear Collider Applications”, W. Lawson, G. P. Saraph, J. P. Calame, J. Cheng, M. Castle, B. Hogan, M. Reiser, and V. L. Granatstein, IEEE Part. Accelerator Conf., May1995.
  32. “A Study of Parametric Instability in a Harmonic Gyrotron: Designs of Third Harmonic Gyrotrons at 94GHz and 210GHz”, G. P. Saraph, T. M. Antonsen, G. S. Nusinovich, and B. Levush, IEEE Int. Conf. on Plasma Science, p.203, June 1994.
  33. “Transverse Energy Distribution corresponding to Generalized K-V Distribution for Asymmetric or Mismatched Beam”, G. P. Saraph and M. Reiser, Joint Meeting of APS and AAPT, p.1241, April 1994.
  34. “Modeling of Mode Purity in High Power Gyrotrons”, T. M. Antonsen, S. Y. Cai, G. P. Saraph, and B. Levush, APS Division of Plasma Physics, p.2003, Nov.1993.
  35. “Modeling of Mode Purity in High Power Gyrotrons”, S. Y. Cai, T. M. Antonsen, G. P. Saraph, and B. Levush, Eighteenth Int. Conf. on Infrared and Millimeter Waves, Sept.1993.
  36. “Mode Interaction at Cyclotron Harmonics in Gyrotron Oscillators”, G. P. Saraph, G. S. Nusinovich, T. M. Antonsen, and B. Levush, Seventeenth Int. Conf. on Infrared and Millimeter Waves, Dec.1992.
  37. “Sideband Mode Competition in a Gyrotron Oscillator”, Expt.: M.I.T.- W. C. Guss, M. A. Basten, K. E. Kreischer, R. J. Temkin, and Theory: U. Maryland- T. M. Antonsen, S. Y. Cai, G. P. Saraph, and B. Levush, IEEE Int. Conf. on Plasma Science, p.1516, Nov.1992.
  38. “Nonlinear Dynamics of Mode Interaction in a Harmonic Gyrotron”, G. P. Saraph, G. S. Nusinovich, T. M. Antonsen, and B. Levush, IEEE Int. Conf. on Plasma Science, p.1355, Nov.1992.
  39. “Stability and Nonlinear Dynamics of Gyrotrons at Cyclotron Harmonics”, G. P. Saraph, G.Nusinovich, T. M. Antonsen and B. Levush, Beams 92 - 9th Int. Conf. on High Power Particle Beams, May 1992.
  40. “Stability and Nonlinear Dynamics of Gyrotrons at Cyclotron Harmonics”, G. P. Saraph, G. S. Nusinovich, T. M. Antonsen and B. Levush, Joint Meeting of the APS and AAPT, April 1992.
  41. “Nonlinear Simulations of High Power Gyrotrons”, S. Y. Cai, T. M. Antonsen, G. P. Saraph, and B. Levush, IEEE Int. Conf. on Plasma Science, p.184, June 1991.
  42. “Depressed Collectors for a Radially Extracted Beam in a Gyrotron”, A. Singh, G. P. Saraph, and V. L. Granatstein, IEEE Int. Conf. on Plasma Science, p.178, June 1991.
  43. “An Energy Recovery System for a Quasi-Optical Gyrotron”, A. Singh, V. L. Granatstein, G. Hazel, G. P. Saraph, J. M. Cooperstein, and T. Hargreaves, Fifteenth Int. Conf. on Infrared and Millimeter Waves, pp.333-335, Dec.1990.
  44. “Regions of Single Mode Operation in High Power Gyrotron Oscillator”, G. P. Saraph, G. I. Lin, T. M. Antonsen, and B. Levush, Fifteenth Int. Conf. on Infrared and Millimeter Waves, pp.333-335, Dec.1990.
  45. “The Phenomenological Study of the Electrodynamic Effects in a Nuclear-driven Strong Interaction MHD Channel”, S. Anghaie and G. P. Saraph, Joint AIAA and ASME Int. Conf., Reno, Nevada, Jan.1990.
  46. “Preliminary Analysis of a Strong Interaction Line-MHD Generator for Space Power Application”, G. P. Saraph and S. Anghaie, 7th Symp. on Space Nuclear Power Systems, Jan.1990.
Journal Publications
  1. “Highly Scalable, Fast, and Dynamic Routing Scheme based on Virtual Space Representation”, G. P. Saraph, R. Aggarwal, B.Walia and S. Govardhan, (to be submitted), 2004.
  2. “A Comparative Study of Three Single-stage, Depressed-collector Designs for 1 MW, CW Gyrotron”, G. P. Saraph, K. Felch, J. Feinstein, P. Borchard, S. Cauffman, and S. Chu, IEEE Trans. on Plasma Science, vol.28, no.3, June 2000.
  3. “High-power Operation of a Three-cavity X-band Coaxial Gyroklystron”, W. Lawson, J. Cheng, J. P. Calame, M. Castle, B. Hogan, V. L. Granatstein, M. Reiser, and G. P. Saraph, Phys. Rev. Lett., vol.81, no.14, pp.3030-3033, Oct.,1998.
  4. “Frequency Tunability and Phase Stability of Gyroklystron Amplifiers for Driving Linear Accelerators”, G. P. Saraph, Particle Accelerators, vol.59, pp.1-17, 1998.
  5. “Design of Depressed Collectors for the High Power, Pulsed Gyroklystron Amplifiers”, G. P. Saraph, V. L. Granatstein, and W. Lawson, IEEE Trans. on Electron Devices, vol.45, no.4, pp.986-990, April 1998.
  6. “Scaling Law for Ballistic Bunching in Multicavity Harmonic Gyroklystron Amplifiers”, G. S. Nusinovich, G. P. Saraph, and V. L. Granatstein, Phys. Rev. Lett., vol.78, no.9, pp.1815-1818, March 1997.
  7. “A Novel Hybrid Slow Wave / Fast Wave Traveling-Wave Amplifier”, W. Lawson, A. Fernandez, T. Hutchins, and G. P. Saraph, Phys. Rev. Lett., 1996.
  8. “100-150 MW Designs of Three-cavity Gyroklystron Amplifiers Operating at Fundamental and Second Harmonics in X- and Ku-Band”, G. P. Saraph, W. Lawson, M. Castle, J. Cheng, J. P. Calame, and G. S. Nusinovich, IEEE Trans. on Plasma Science, vol.24, no.3, pp.671-677, June 1996.
  9. “Design of a High Efficiency, Low Voltage, Axially Modulated, Cusp-Injected, Second Harmonic, X-Band Gyrotron Amplifier”, W. Lawson, A. Grigoropolous, A. Liu, G. P. Saraph, J. Rodgers, and W. W. Destler, IEEE Trans. on Plasma Science, vol.24, no.3, pp.678-686, June 1996.
  10. “A Study of Parametric Instability in a Harmonic Gyrotron: Designs of Third Harmonic Gyrotrons at 94GHz and 210GHz”, G. P. Saraph, T. M. Antonsen, G. S. Nusinovich, and B. Levush, Phys. of Plasmas, vol.2, no.7, pp.2839-2846, July 1995.
  11. “Transverse Energy Distribution corresponding to Generalized K-V Distribution for Asymmetric or Mismatched Beam”, G. P. Saraph and M. Reiser, Particle Accelerators, vol.49, pp.15-26, 1995.
  12. “Influence of Sideband Oscillations on Gyrotron Efficiency”, (Experiment) W. C. Guss, M. A. Basten, K. E. Kreischer, R. J. Temkin, and (Theory) T. M. Antonsen, S. Y. Cai, G. P. Saraph, and B. Levush, IEEE Trans. on Plasma Science, vol.22, no.5, pp.871-877, Oct.1994.
  13. “Nonlinear Theory of Stable, Efficient Operation of a Gyrotron at Cyclotron Harmonics”, G. P. Saraph, T. M. Antonsen, G. S. Nusinovich, and B. Levush, Phys. of Fluids B, vol.5, no.12, pp.4473-4485, Dec.1993.
  14. “Generalized K-V Distribution for Asymmetric Beam”, G. P. Saraph and M. Reiser, CPB Report 93-046, University of Maryland, 1993.
  15. “Sideband Mode Competition in a Gyrotron Oscillator”, (Experiment) W. C. Guss, M. A. Basten, K. E. Kreischer, R. J. Temkin, and (Theory) T. M. Antonsen, S. Y. Cai, G. P. Saraph, and B. Levush, Phys. Rev. Lett., vol.69, no.26, pp.3727-3730, Dec.1992.
  16. “Regions of Stability of High Power Gyrotron Oscillators”, G. P. Saraph, T. M. Antonsen, B. Levush, and G. I. Lin, IEEE Trans. on Plasma Science, vol.20, no.3, pp.115-125, June 1992.
  17. “Multifrequency Theory of High Power Gyrotron Oscillators”, S. Y. Cai, T. M. Antonsen, G. P. Saraph, and B. Levush, Int. J. of Electron., vol.72, nos.5-6, pp.759-777, May 1992.
  18. “Magnetic Field Profiles in Depressed Collector Region for Small Orbit Gyrotrons and Axial or Radially Extracted Spent Beam”, A. Singh, G. Hazel, V. L. Granatstein, and G. P. Saraph, Int. J. of Electron., vol.72, nos.5-6, pp.1153-1163, May 1992.
 
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