Title :
S-resonator with an end reflector
Author :
Langlois, Sylvain ; Lit, John W.Y.
Author_Institution :
JDS Fitel Corp., Nepean, Ont., Canada
fDate :
8/1/1999 12:00:00 AM
Abstract :
An S-resonator with an end reflector (SRER) is analyzed in terms of its resonance conditions and directional properties. An S-resonator has a main fiber ring to which is attached an S-shaped fiber by means of two couplers. Compared to the basic S resonator (BSR), the SRER has a highly reflecting reflector at a free end of one of the coupler ports. Because of the complex recirculating routes in the two resonators, their characteristics depend strongly on the coupling coefficients of the couplers; the phase resonance condition for the subcavity can even be shifted from an even to an odd integer of π, or vice versa. The new resonator can offer a higher clockwise over counterclockwise circulating intensity ratio. This can be very useful in the design of a ring fiber laser without an isolator
Keywords :
fibre lasers; optical fibre couplers; optical fibre theory; optical resonators; S-resonator; S-shaped fiber; SRER; basic S resonator; clockwise circulating intensity ratio; complex recirculating routes; counterclockwise circulating intensity ratio; coupler ports; coupling coefficients; directional properties; end reflector; free end; highly reflecting reflector; main fiber ring; odd integer; optical fibre couplers; phase resonance condition; resonance conditions; subcavity; Clocks; Fiber lasers; Isolators; Optical design; Optical fiber couplers; Optical fiber polarization; Optical ring resonators; Physics; Resonance; Ring lasers;
Journal_Title :
Lightwave Technology, Journal of
