Abstract:
We have investigated the characteristics of a dual-wavelength cascaded Raman laser based on a composite resonator configuration using a fiber WDM coupler and two pairs of...Show MoreMetadata
Abstract:
We have investigated the characteristics of a dual-wavelength cascaded Raman laser based on a composite resonator configuration using a fiber WDM coupler and two pairs of fiber Bragg gratings. The WDM coupler, which served to form a ring cavity and acted as an output coupler simultaneously, made the laser system simple and effective. Since the WDM coupler is made by the fused biconical taper technique and has the characteristic of periodic transmission windows, it can be designed to resonate at wavelengths corresponding to high odd Stokes orders simultaneously.
Date of Conference: 13-16 November 2000
Date Added to IEEE Xplore: 06 August 2002
Print ISBN:0-7803-5947-X
Print ISSN: 1092-8081
Citations are not available for this document.
Cites in Patents (1)Patent Links Provided by 1790 Analytics
1.
Grudinin, Anatoly B., c/o Centre for Enterprise &; Nilsson, Johan, c/o Centre for Enterprise &, "Raman cascade light sources"
Inventors:
Grudinin, Anatoly B., c/o Centre for Enterprise &; Nilsson, Johan, c/o Centre for Enterprise &
Abstract:
A Raman cascade laser comprising a 1060 nm pump source (10), an input waveguide (12) and a ring waveguide (14) coupled to the input waveguide. The ring waveguide is at least in part formed of phosphosilicate fiber so as to Raman scatter the pump beam from the pump wavelength to a gain wavelength that is offset from the pump wavelength by a first Raman step of 1330 cm-1. Light is coupled out with an output waveguide (18) coupled to the ring waveguide at an emission wavelength offset by a second Raman step of 1330 cm-1 from the gain wavelength. Other embodiments provide incoherent sources based on the same 2-step Raman cascade, or a 2-step Raman cascade based on a first phosphosilicate 1330 cm-1 Raman step followed by a second step of 680-820 cm-1. With the invention, it is possible to avoid a Raman cascade involving a larger number of steps while at the same time avoiding use of 1300 nm pump sources. Moreover, the need for high-reflectivity fiber Bragg gratings at the gain wavelength, and also the emission wavelength, can be reduced through wavelength selection provided by the coupling to the ring waveguide.
Assignee:
UNIVERSITY OF SOUTHAMPTON
Filing Date:
18 July 2001
Grant Date:
22 January 2003
Patent Classes:
Current International Class:
H01S0033000000
