A finesse-enhanced Er-doped-fiber ring resonator

A two-coupler-type Er-doped-fiber ring resonator that compensates for the round-trip optical loss by optical amplification is proposed. Also proposed is a mode-filtered heterodyne method for resonant-linewidth measurements which does not demand narrow-linewidth light sources, but uses the beat noise between two uncorrelated lights filtered by the resonator passband. With this method, a finesse >or=500 and a resonant linewidth >

[1]  I. Henning,et al.  Semiconductor laser linewidth broadening due to 1/f carrier noise , 1983 .

[2]  H. Shaw,et al.  Low-threshold synchronously pumped all-fiber ring Raman laser , 1987 .

[3]  K. Iwatsuki,et al.  Spectral linewidth broadening in Er-doped-fibre amplifiers measured with less than 1.4 kHz linewidth light source , 1990 .

[4]  T. Okoshi,et al.  Dependence of semiconductor laser linewidth on measurement time: evidence of predominance of 1/f noise , 1985 .

[5]  S. R. Mallinson.  Wavelength-selective filters for single-mode fiber WDM systems using Fabry-Perot interferometers. , 1987, Applied optics.

[6]  K. Kikuchi,et al.  Novel method for high resolution measurement of laser output spectrum , 1980 .

[7]  Effects of stimulated Brillouin scattering on the performance of polarization-maintaining all-fiber ring resonators. , 1989, Optics letters.

[8]  Y H Ja.  Single-mode optical fiber ring and loop resonators using degenerate two-wave mixing. , 1991, Applied optics.

[9]  H. J. Shaw,et al.  Sensitive all-single-mode-fiber resonant ring interferometer , 1983 .

[10]  D. Marcuse,et al.  Ultrahigh finesse fiber Fabry-Perot interferometers , 1986 .

[11]  E. Desurvire,et al.  Theory and implementation of a Raman active fiber delay line , 1986 .

[12]  Novel measuring method for spectral linewidth of laser diodes using fibre-optic ring resonator , 1985 .

[13]  H J Shaw,et al.  All-single-mode fiber resonator. , 1982, Optics letters.

[14]  H. J. Shaw,et al.  Filter response of single-mode fibre recirculating delay lines , 1982 .

[15]  Jiangde Peng,et al.  Fibre ring resonator with finesse of 1260 , 1988 .

[16]  Katsumi Iwatsuki,et al.  Wavelength-tunable single-frequency and single-polarisation Er-doped fibre ring-laser with 1.4 kHz linewidth , 1990 .

[17]  K. Iwatsuki,et al.  Fiber-optic sensor using an injection-locked local laser , 1991 .