Amaresh Mahapatra

Echelon grating multiplexers for hierarchically multiplexed fiber-optic communication networks

Echelon gratings have many beneficial properties when used as the dispersing mechanism of a fiber-optic wavelength multiplexer including high optical dispersion, high optical efficiency, greatly reduced sensitivity to polarization, simultaneous utility on many wavelength bands, and a capability for hierarchical multiplexing. The use of echelon multiplexers in a hierarchical environment is discussed, and a prototype echelon multiplexer is constructed and used to demonstrate the unique capabilities of this device for creating wavelength division multiplexing systems.

Integrated-optic ring resonators made by proton exchange in lithium niobate

An integrated-optic ring resonator is fabricated in lithium niobate, and its tuning properties are determined.

Design and fabrication of amplitude modulators for CATV

We have fabricated Mach Zehnder type amplitude modulators with performance levels suitable for CATV industry. Fiber to fiber insertion loss with polarization preserving fibers of 45 dB has been achieved. We present detailed measurements of the sources of loss: mode mismatch loss in the Y junctions loss due to angled ends and Fresnel loss.