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We present preliminary data which show that it is possible to prevent longitudinal mode hops in a unidirectional erbium ring fibre laser by including an all fibre etalon formed from chirped fibre Bragg reflectors. A reduction in the relative intensity noise of 10 dB is observed when the laser is frequency stabilised. A resolution limited linewidth of 170 kHz is observed from the laser.
The effect of loss on a twin 2 2 coupler fibre resonator is to limit the amount of light that is coupled into the resonator. We present a numerical analysis and experimental data which show that the amount of light that is coupled into the initial resonator can be increased by the addition of a secondary resonator containing a single 2 2 coupler. We show that by a suitable choice of the coupling...
Summary form only given. Single-frequency erbium fiber and lasers are attracting interest. One way of forcing narrow linewidth operation from this type of laser is to use a pair of integrated fiber etalons. One etalon defines the oscillating wavelength the other is used to stop longitudinal-mode hops. These etalons are the integrated-optic equivalents of bulk devices requiring the light to exit the...
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