The transmission characteristics of the PMF-based MRLPG were meas

The transmission characteristics of the PMF-based MRLPG were measured using the experimental setup as shown in Figure 3. The measurement setup consists of a broadband light source, linear translation SB431542 stages, and an optical spectrum analyzer. Both ends of the PMF-MRLPG were clamped by two linear translation stages. A distance between two translation stage was 30 cm. Strain was applied by GSK2126458 cost moving the translation stage outwards. Figure 3 Experimental setup for measurement of the transmission characteristics of the PMF-based MRLPG. Figure 4a shows

the transmission spectra of the fabricated PMF-based MRLPG with variations in strain. The birefringence of the PMF generated two resonant peaks in the transmission spectrum of the PMF-based MRLPG when strain was applied. Since the mode coupling between core and cladding modes based on the photoelastic effect is enhanced by increasing strain, the extinction ratio of the PMF-based MRLPG is obviously raised by strain. Two resonant wavelengths of the PMF-based MRLPG corresponding to two orthogonal polarization states were measured to be 1,395 and 1,471 nm. In Figure 4b, the variations of extinction ratios of two resonant peaks at wavelengths of 1,395 and 1,471 nm were measured to be https://www.selleckchem.com/products/SRT1720.html −10.16 and −14.13 dB, respectively, when the applied strain was 840 μϵ. However, two resonant wavelengths were almost not changed by the applied

stain because the photoelastic effect was simultaneously induced in the core and the cladding regions. When strain is applied to the PMF-based MRLPG, the variations of the effective refractive indices in the core and the cladding regions are almost identical, which induces the same amount of two self-coupling strengths in the core and the cladding modes [4]. It means that the proposed PMF-based MRLPGs can provide a simple sensing

scheme for measurement of strain filipin by monitoring the transmission power variation with respect to the external strain change. Figure 4 Transmission spectra (a) and variation of extinction ratios of two resonant peaks (b) of PMF-based MRLPG. Conclusion We proposed and experimentally demonstrated a fabrication method for the PMF-based MRLPG using the double coating and the wet etching processes, which has the great potential for mass production. The transmission characteristics of the PMF-based MRLPG with variations in strain were measured. Two resonant peaks of the PMF-based MRLPG were observed in the transmission spectrum of the PMF-based MRLPG because of the birefringence of the PMF. The extinction ratios of two resonant peaks of the PMF-based MRLPG were enhanced by increasing the applied strain without variation in their resonant wavelengths because of the photoelastic effect. The variation of the extinction ratios of two resonant peaks at wavelengths of 1,395 and 1,471 nm were measured to be −10.16 and −14.

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