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 Fiber Optics and Photonics 
Dr. Ranjan Sen
Head, Glass Division and

Senior Scientist, Fiber Optics & Photonics Division

Phone: (033) 24838083 (Ex. 3279)
FAX: +91-33-24730957
E-mail: rsen@cgcri.res.in

B.E. (Chemical Engg.), Jadavpur University, Kolkata
M.E. (Chemical Engg.) Jadavpur University, Kolkata
Ph. D. (Engg.) Jadavpur University, Kolkata

Dr. Sen joined CGCRI in in May, 1983

Research Interest
  • Specialty optical fibers for applications in high power fiber laser, Optical amplifier, fiber Bragg gratings, interferrometric sensors etc. In the area of Glass Science and technology, the research interest is primarily towards specialty glass and glass ceramics for advanced applications.

Professional Career
  • Continuing as a Research Scientist since 1983 in Fiber Optics & Photonics Division
  • Associated with Glass Division since last three years and has presently taken over as Head of the Division.
  • Worked as a Guest Scientist in Technical University, Braunschweig, Germany during 2004 - 2005

  • DAAD Fellowship in 1990-91
  • Deokaran Award of Indian Ceramic Society in 1991
  • Best paper award in OECC 2003 Conference in China
  • Invitation from TU Braunschweig, Germany to join as a guest Scientist during 2004-05
  • Royal society award project in 2008 with City University, London

Selected Publications
Summary: Publications: 54 Nos;
Five best publications:
  1. "Ytterbium sensitized Thulium doped fibre laser at near IR with 980 nm pump" Atasi Pal, Anirban Dhar, Shyamal Das, Shu Ying Chen, Tong Sun, Ranjan Sen, Kenneth T V Grattan Opt. Express Vol. 18, No. 5068-50745, 2010
  2. "The mechanism of rare earth incorporation in solution doping process", Anirban Dhar, Atasi Pal, Mukul Ch. Paul, P. Ray, Himadri S. Maiti and Ranjan Sen, Opt. Express 16(17), 12835-12846, 2008.
  3. "Optimization of melting and casting conditions for Zr-fluoride based glasses", R. Sen, R. Caspary and W. Kowalsky, Optical Materials, Vol.29, No. 8, p. 1035 ? 1040, 2007.
  4. "Characterization of porous core layer for controlling rare earth incorporation in optical fiber", Anirban. Dhar, Mukul Ch. Paul, Mrinmay Pal, Ashok Kr. Mondal, Suchitra Sen, Himadri Sekhar Maiti and Ranjan Sen, Optics Express, 14(20), 9006-9015, 2006.
  5. Rare-earth doped optical fibre from oxide nanoparticles", Minati Chatterjee , Ranjan Sen , Mrinmay Pal , Milan Naskar , Mukul Paul , Shyamal Bhadra , Kamal Dasgupta , Dibyendu Ganguli, Tarun Bandyopadhyay, Aharon Gedanken and Renata Reisfeld, ACTA OPTICA SINICA, Vol.23, p.35-36, 2002. (The paper got best paper award in OECC 2003 conference in China)

Patents filed / Granted
23 Nos.

Notable Research Contribution
  • Establishment of a state of the art facility for manufacturing specialty fiber preforms and demonstration of the technology of making a few varieties of specialty fiber including those for optical amplifiers and fiber lasers.
  • Demonstration of a new route of making rare earth doped optical fiber under an Indo-Israel collaborative programme.
  • Development of the process know-how of making rare earth doped fluoride glass preforms and fibers of various designs.
  • Technology demonstration and production of two important varieties of specialty glasses.

PhD Supervision
Summary: Completed (1), Ongoing (3);
Research Topics: Solution doping process for fabrication of rare earth doped fibers, Fiber laser for gas sensor application, rare earth doping in preforms/fibers by vapor phase technique, Optical fiber for use in hazardous environment

    Updated on: 30-05-2010 15:00 
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