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We have fabricated Bragg gratings by using thermally expanded core fiber (TEC-fiber) and their transmission spectrums have been analyzed. The measured spectrums show double lobe structure reflecting the effective index variation along the fiber axis and also the characteristic peak splitting caused by the grating pair formed over the expanded section, which implies that the effective index profile...
We propose a simple laser diode module that consists of a Fabry–Perot laser diode (FP-LD) and a fiber Bragg grating (FBG) for a compact, stable and low-cost wavelength division multiplexing light source. The spectral bandwidth of the laser output from the FP-LD/FBG module was measured to be 0.024nm. The side mode suppression ratio (SMSR) was 44.42dB at the injected electric current of 14mA and at...
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