Single-mode optical fiber ring and loop resonators using degenerate two-wave mixing

Abstract

Single-mode optical fiber ring (or loop) resonator utilizing degenerate two-wave mixing is proposed. The degenerate two-wave mixing can bring the fiber ring into full resonance and enhance the finesse or amplify the output intensity and change its characteristic from being of the channel-blocking to channel-passing type.

A Single-mode Fibre Ring Resonator with a Nonlinear Fibre Directional Coupler Using Degenerate Two-wave Mixing

“…where the transfer matrix is written as W=a cosKz -jsinKz -jsinKK z cosKz (2) where KK is the coupling coefficient between the two fibres . We assume that there is no severe disturbance to the basic structure of the field inside the coupler due to the thin photorefractive slab and that the intensity of the pump beam is much larger than those of other beams (Ip >I 1 4) .…”

“…In a previous paper [2], we proposed an active scheme using photorefractive fibres with degenerate two-wave mixing (DTWM) to increase the finesse of the SCFR . Compared with other amplifying schemes such as a rare-earth doped fibre or the stimulated Raman scattering, the DTWM in photorefractives is more suitable to use in fibre rings with short ring lengths, because of its large gain per unit length [2] .…”

“…Compared with other amplifying schemes such as a rare-earth doped fibre or the stimulated Raman scattering, the DTWM in photorefractives is more suitable to use in fibre rings with short ring lengths, because of its large gain per unit length [2] . For instance, a few mm length of a photorefractive fibre can provide a DTWM gain larger than 20 dB .…”

Pure angular momentum generator using a ring resonator

“…On the other hand, ring resonators have been widely used for biomaterial sensing [13], optical filtering [14,15] and optical wave mixing [16] thanks to its merits such as high Qfactor, narrow linewidth and flexible free spectrum range (FSR). Many materials including polystyrene [13], silicon [17] and silica [15] are used for fabricating the ring resonators, which also provide us a large range of refractive index (1.5 -3.5) for the design.…”

On the existence condition for bistability in a one‐coupler optical fiber ring resonator by using degenerate two‐wave mixing

“…In this Letter, we present a general theoretical study of the existence condition for the DTWM bistability when two different all-fiber schemes [I, 6,7] are used to implement the DTWM in a one-coupler fiber ring resonator. and it does not propagate inside the fiber.…”