Patent Number: 6,801,356

Title: Optical parametric devices and methods for making same

Abstract: An optical parametric device for broadband parametric processes involving first and second frequencies .omega..sub.1 and .omega..sub.2. The device comprises an optical fiber comprising a core and a cladding, the cladding being microstructured with holes for providing waveguiding confinement of at least one optical mode in the core. The optical fiber is poled lengthwise with a non-linearity profile having a period that satisfies a quasi phase matching (QPM) condition including the first and second frequencies. Through the use of a poled holey fiber of suitable hole structure, it is possible to increase the second harmonic (SH) efficiency in comparison with poled conventional (non-holey) fiber. This is achieved by a combination of a low mode overlap area between the fundamental and SH waves, a low absolute value of the mode area, and a large SH bandwidth per unit length of the fiber, all of which can be provided together in a poled holey fiber.

Inventors: Broderick; Neil (Southampton, GB), Pruneri; Valerio (Milan, IT), Richardson; David (Southampton, GB), Monro; Tanya (Southampton, GB)

Assignee: University of Southampton

International Classification: G02F 1/39 (20060101); G02F 1/383 (20060101); G02B 6/02 (20060101); G02F 1/35 (20060101); G02F 1/377 (20060101); G02F 1/01 (20060101); G02F 001/365 (); G02F 001/383 ()

Expiration Date: 10/05/2021