Fiber optics

Experimental work in this area was initiated in 1999 at IIT Bombay with sponsored funding from Ministry of Information Technology, Government of India. Subsequently, the work received funding from DIT, CSIR and initiation grant of IIT Kanpur. Some highlights of the work done so far:

1. High-power EDFA was modeled and constructed with bi-directional pumping, which is capable of yielding more than 22 dBm of amplified signal power.
2. Spectral enrichment was demonstrated with the propagation of this high power signal through low dispersion fibers.
3. A complete numerical code was written for single- and multi-channel amplification in active fibers, which includes pump depletion and signal
4. Numerical code was written for pulse propagation in fibers including the effects of second- and third-order dispersion, third-order nonlinearity (scattering and refractive effects) and gain/loss.
5. Numerical code for the study of spectral characteristics of a ring cavity fiber laser design is available.
6. A ring cavity fiber laser with interesting wavelength-tuning characteristics and coherent broadband output has been studied.
7. Mode-locking of the fiber laser demonstrated at a high repetition rate of 10 GHz with a low-cost Gunn oscillator as the RF source. Pulse widths of the order of 15 ps.
8. Study of Stimulated Brillouin Scattering in fibers towards slow light generation.
9. Nonlinear dynamical studies on erbium-doped fiber laser subjected to cavity-loss modulation – features of resonance of driven system, bistable response and modeling of the experimental conditions.
10. Coherence characterization of broadband laser generated by four wave mixing in a ring cavity.