Fiber Laser Dispersion Compensator

Brief Description
Brief Description:
Fabricated from single-mode optical fiber, novel tapered structures compensate for dispersion and provide non-linearity in laser systems.

With doped optical fiber, a new class of compact, inexpensive mode-lock fiber lasers can be built. With tapered structures of doped PM (polarizing maintaining) fiber, a PM mode-locked fiber laser can be fabricated.  This design is advantaged over alternative solutions because it is an integrated structure which is fusion spliced at both ends. 
The concept can also be applied in an optical amplifier, in which the doped fiber is tapered to provide the dispersion compensation and the laser is pumped in an un-tapered region of the fiber or by using pump light from each end.

In a conventional fiber laser, complex external optical elements, such as intra-cavity prism pairs, are needed to compensate for the normal dispersion of the fiber.  With this new technology, tapered structures are built into the doped fiber itself so that the ?anomalous? dispersion compensates for the ?normal? dispersion of the fiber. The laser then becomes much more compact and inexpensive by eliminating the large components and the labor required to align them. 

Technology Status:
 See also the related UR technology no. 2-11150-05017, on a fiber laser super-continuum light source built using this kind of device.
Patent Information:
Title Country Patent No. Issued Date
Fiber Device with High Nonlinearity, Dispersion Control and Gain United States 7,024,078 4/4/2006
For Information, Contact:
Curtis Broadbent
Licensing Manager
University of Rochester
Wayne Knox