Location History:
- Calcutta, IN (2004 - 2005)
- Kolkatta, IN (2005)
- Kolkata, IN (2014 - 2018)
Company Filing History:
5 out of 2,096 
1 out of 232 
1 out of 4 Years Active: 2004-2018
Title: Ranjan Sen: Innovator in Optical Fiber Technology
Introduction
Ranjan Sen is a prominent inventor based in Kolkata, India, known for his significant contributions to the field of optical fiber technology. With a total of 5 patents to his name, he has developed innovative methods that enhance the performance and reliability of optical fibers.
Latest Patents
One of his latest patents is titled "Process for fabrication of ytterbium doped optical fiber." This invention provides a process for creating ytterbium (Yb) doped optical fiber through a vapor phase doping technique. The method involves the simultaneous deposition of Al2O3 and Yb2O3 in vapor phase along with silica during the formation of the sintered core layer. The process parameters have been optimized to minimize variations in dopant concentration along the length of the preform, achieving good repeatability and producing fibers with excellent optical properties suitable for fiber lasers.
Another notable patent is the "Method for fabricating rare earth (RE) doped optical fiber using a new co-dopant." This invention introduces a method of making RE doped optical fiber using BaO as a co-dopant, which eliminates unwanted core-clad interface defects commonly found in Al doped fibers. The resulting fibers exhibit good RE uniformity and relatively low optical loss, making them suitable for applications in amplifiers, fiber lasers, and sensor devices.
Career Highlights
Ranjan Sen has worked with esteemed organizations such as the Council of Scientific & Industrial Research and Bar-Ilan University. His work has significantly advanced the field of optical fibers, particularly in the development of new doping techniques that improve fiber performance.
Collaborations
Throughout his career, Ranjan has collaborated with notable colleagues, including Mukul Chandra Paul and Shyamal Kumar Bhadra. These collaborations have contributed to the successful development of his innovative patents.
Conclusion
Ranjan Sen's contributions to optical fiber technology through his innovative patents have made a lasting impact in the field. His work continues to influence advancements in fiber optics, showcasing the importance of innovation in technology.