Chandra Yelleswarapu

I am a Post-Doc of Dr. Rao.

Department of Physics
University of Massachusetts Boston
100 Morrissey Blvd.
Boston, MA , 02125 -3393


my office: S-3-80

phone: (617) 287-6063
email: Chandra.Yelleswarapu "at" umb.edu

Currently I am working as a Senior Postdoctoral Research Associate in Physics Department, University of Massachusetts – Boston. My research interests are Nano and Bio photonics with applications to medical imaging and image processing, optical sensors and sensor protection and Fiber optics. At present I am working on projects involving early detection of microcalcifications in screen film as well as digital mammograms for breast cancer diagnostics and optical power limiting for eye and sensor protection from high and low power lasers. I was involved in inventing an image processing technique for digital mammograms to detect radiologists features of interests - microcalcifications, masses and lesions, which led to a patent applications through University of Massachusetts Boston. I am also a part-time lecturer teaching graduate level lab based Analog and Digital Electronics courses

Researrch Interests:

  • Medical Imaging and image processing
  • Nonlinear optics and applications to power limiting
  • Environmental sensing / Diode laser absorption spectroscopy
  • High power fiber lasers and fiber-optic Bragg gratings

    • Education:

  • Ph.D. Physics/Optics; Alabama A & M University, USA, May 2001. Dissertation Title: Line width broadening and detection sensitivity measurements using tunable diode laser absorption spectroscopy : an application to v1+3v3 overtone band of acetylene.
  • M.Phil. Physics; University of Hyderabad, India, November 1994. Thesis Title: Measurement of optical parameters and interaction of light in thin films.
  • M.Sc. in Electronics; Nagarjuna University, India, April 1993.
  • B.Sc. (Mathematics, Physics, Electronics); Osmania University, India, April 1990.

    • Selected Publications:

  • Chandra S. Yelleswarapu, Pengfei Wu, Sri-Rajasekhar Kothapalli, D. V. G. L. N. Rao, B. Kimball, S. Sivasankara Sai, R. Gowrishankar, and S. Sivaramakrishnan, "All-optical spatial filtering with power limiting materials", Optics Express, 14, 2006. (PDF)
  • Chandra S. Yelleswarapu, Pengfei Wu, Sri-Rajasekhar Kothapalli and D. V. G. L. N. Rao, "Nonlinear optical image processing with bacteriorhodopsin polymer films," proceedings of the VIIIth International Conference on Frontiers of Polymers and Advanced Materials, Cancun 2005 (Molecular Crystals & Liquid Crystals, vols 446-448).
  • Sri-Rajasekhar Kothapalli, Pengfei Wu, Chandra S. Yelleswarapu and D. V. G. L. N. Rao, "Nonlinear optical Fourier filtering for medical image processing", Journal of Biomedical Optics 10, 0440281 - 0440287, 2005.
  • Sri-Rajasekhar Kothapalli, Chandra S. Yelleswarapu,Sriram G Naraharisetty, Pengfei Wu, and D. V. G. L. N. Rao, "Spectral phase based medical image processing", Academic Radiology, 12, 708, 2005.
  • Sri-Rajasekhar Kothapalli, Pengfei Wu, Chandra S. Yelleswarapuand D. V. G. L. N. Rao, "Medical image processing using transient Fourier holography in bacteriorhodopsin films", Applied Physics Letters, 85, 5836, 2004.
  • D. Narayana Rao, Chandra S. Yelleswarapu, Sri-Rajasekhar Kothapalli, D. V. G. L. N. Rao, and B. Kimball, "Self-diffraction in bacteriorhodopsin films for low power optical limiting", Optics Express, 11, 2848, 2003.
  • Ning Ma, Chandra S Yelleswarapu, Joey, Ravi K. Jain, "A narrow linewidth (< 1 GHz), > 35nm wavelength-tunable mid-IR fiber laser for spectroscopic sensing applications", CLEO/QELS Proceedings, 1533-35, 2003.
  • C. Yelleswarapu and A. Sharma, "A simple technique for indirect measurement of absorption line widths in Voigt profile regime," JQSRT, 72, 733, 2002.
  • C. Yelleswarapu and A. Sharma, "Pressure-induced self-broadening and frequency shift measurements of absorption lines of Acetylene using Tunable Diode Laser Absorption Spectroscopy," Journal of Quantitative Spectroscopy and Radiative Transfer, 69, 151, 2001.
  • Y. Wang, L. Phillips, C. Yelleswarapu, T. George, A. Sharma, S. Burgett and P. Ruffin, "Enhanced growth rate for Bragg grating fabrication in optical fibers with titania-doped cladding," Opt. Commu. 163, 185, 1999.
  • M. V. Sailaja, Y. Chandrasekhar, D. Narayana Rao and V. S. Rama Das, "Laser-induced chlorophyll fluorescence ratio in certain plants exhibiting leaf heliotropism, "Australian Journal of Plant Physiology, 24, 159-164, 1997.
  • V. Nirmal Kumar, Y. Chandrasekharand D. Narayana Rao, "Measurements of Optical constants of thin polymer films using white light interferometry," Pramana, 47, 163-170, 1996.

    • Physics 601 Course Outline Fall 2005

    Physics 600 Syllabus for Spring 2005

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