Fig 2 - uploaded by Azam Gholampour
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The microsphere and external feedback mirror, that the mirror may be replaced by the image of the microsphere in the mirror
Source publication
In this paper we proposed an active optical sensor designed based on the 3 Er -doped microsphere coupled to an external mirror. The microsphere-mirror coupling causes the degeneracy splitting of the resonance frequencies. Each of resonance frequencies splits in to two different resonance frequencies .The coupling coefficient changes as a result of...
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This paper presents the design and simulation of an optical sensor using a metal–insulator-metal (MIM) configuration, employing the finite difference time domain method to analyze the structure of the proposed sensor. The present study investigates the influence of both geometric and physical parameters of a designed resonator on the light transmis...
Citations
... Many biochemical sensors on the basis of the linear and nonlinear effects around microspheres are reported [13][14][15][16][17]. In the presence of an external non-metallic mirror in adjacent of microsphere, the degenerate resonance frequencies of microspheres are split in to two new frequencies [18]. In a microsphere Raman laser, corresponding to each of new resonance frequencies a Raman oscillation frequency can exists. ...
... Each of the characteristic equations (18) and (19) ...
In the presence of an external nonmetallic mirror in adjacent of a microsphere resonator each of the resonance frequency of the microsphere is split into two different resonance frequencies. The new frequencies are symmetrical around the microsphere resonance frequency. The upper and lower frequencies are called blue and red shifted modes. Depending on the sign of the difference between the ratio of loss to the Raman gain at the blue and red shifted frequencies, one of these modes is stable and the other one is unstable. In this paper on the basis of this effect, two ultra sensitive biochemical sensor design based on the steady state and transient response is proposed. The sensitivity of the sensor based on the steady state regime of operation has its maximum value when the ratio of loss to the Raman gain of red shifted and blue shifted modes have the same value.
