The basic principle of fiber optic gyroscopes is the Sagnac effect proposed by G. Sagnac in 1913, that is, the phase difference between two light waves propagating in opposite directions along a closed loop is proportional to the input angular velocity in the normal direction of the closed opti...
We can see their similarities and differences through the comparison of their definition, working principle and applications. Both of them consist of three parts and have a same principle based on Faraday Effect. However, to overcome the limitation of polarization dependent isolator, polarization ...
20.15. Optical fiber: (a) Composition; and (b) basic working principle of a typical optical fiber. As they are thin, flexible, highly resistant to high temperature (Shimada et al., 2010), and applicable in a radiation environment (Fernandez et al., 2006), optical fiber sensors are attract...
Figure 8 illustrates schematically the principle of a fiber grating based add/drop multiplexer. The grating is located between two three-port optical circulators. (A circulator is a bulk optic element that allows transmission only from port n to port n + 1.) Different channels are incident ...
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The working principle of space-domain active FCRD sensing system can be described as follows. The CW light generated from the tunable semiconductor laser (TSL) is coupled into the frequency-shifted interferometer through the circulator (Cir) and the fiber coupler C0. It produces two light beams ...
Working principle of intracavity optical trapping In our scheme, the particle is trapped inside the cavity of a fiber laser, which leads to a feedback between the position of the particle and the laser emission. When no particle is trapped (Fig. 1a), the optical loss of the cavity is low...
Due to the high thermal conductivity of graphene and the tiny diameter of MKR, a maximum phase shift of 2.1πwas achieved at the highest available voltage of 10 V. The working principle of MKR modulator as an optical switch is as follows: when the light wavelength is close to the resona...
The unidirectional light propagation is enforced by a polarization-independent optical isolator (PI-ISO). The Lyot filter structure which consists of two PCs, two in-line polarizers (ILPs) and PMF is inserted in cavity, as shown in the block diagram of Fig. 1. They form NPR technique. PC...
Schematic of the laser system. Each primary oscillator passes light through a fibered optical isolator and into a combination of fused fiber splitter/combiners to create beatnotes. The three primary oscillators that are frequency stabilized via beatnotes seed four EDFAs, which in turn seed four PP...