In this contribution, we report a home-made single polarization fiber using pit-in-jacket method. The single polarization fiber is realized by using PANDA structure. A piece of the single polarization fiber with the length of 5m is used to test the polarization window and extinction ratio. The central wavelength is 1064nm. This fiber can keep single-polarization transmission in 140 nm bandwidth range. Moreover, it also shows high extinction ratio of 40 dB. The experimental result indicates that the performance of the domestic SPF is close to the imported fiber.
In this contribution, we report a home-made pump-gain integrated fiber (PGIF) based on side-pumped fiber laser scheme. PGIF with a 60cm coiling diameter is characterized in a bidirectional amplifier configuration, 1.6kW laser output with excellent beam quality (M2=1.3) is obtained. The result indicates that PGIF has great potential in power scaling of high power fiber lasers.
The polarization-maintaining fiber coupler (PMFC) is a kind of optical coupler manufactured with
polarization-maintaining fiber (PMF). It is the pivotal device to realizing the linearly polarized light coupling, the
dispersion of light as well as the multiplying. It is one of the core components of the high-precision fiber optic gyroscope
(FOG) and fiber optic hydrophone. This paper reports a kind of thin-diameter PMFC (cladding diameter is 80μm), which
is developed to adapt to the FOG's miniaturization. The difference between the thin-diameter PMFC (Φ80μm) and
conventional PMFC (Φ125μm) in the manufacture technology has been compared. The key technologies of developing
the thin-diameter PMFC (Φ80μm), such as "No tension fused taper", "On-line adjusting main axes of the PMF", "High
stability package" and so on, has been discussed. In addition, it also has been carried on some Mechanical and
environmental tests. The test results show that the thin-diameter PMFC can satisfy the requirements of the miniature
FOG.
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