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1. Imported label inspection optical coupler can ensure high precision.

2. The optical coupler 316 couples a portion of the Raman optical pumping signal propagating in the optical fiber span 306 to an optical filter 318.

3. This feedback circuit is made of optical coupler and TL431. Power supply with it has excellent dynamic response, and also outputs accurate voltage . Moreover, it's a practical circuit.

4. As the mutual isolation between input and output optical coupler, with one-way signal transmission characteristics, and therefore has good electrical insulation and anti-jamming capability.

5. The linear optical coupler is the new photoelectricity device which is spreading in the world.

6. In some embodiments, a separate optical coupler can be used.

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7. The optical coupler is widely applied in the experiments of information optics because of its simple and flexible operation.

8. In some embodiments, a separate optical coupler (not shown) can be used.

9. The optical coupler 424 launches the Raman optical pumping signal in a direction that co-propagates with the optical data signals that are generated by the optical source 402.

10. In order to use optical coupler more convenient and efficient in circuit design, a mathematical model was proposed for the I-V characteristics of optical couplers.

11. A Raman optical pump source 208 that generates a Raman optical pumping signal is optically coupled into the optical fiber span 206 with an optical coupler 210.

12. Aiming at the noise jamming problems in acquisition of small current signals, an isolation and acquisition board for current signal is designed based on HCNR201 high-linearity analog optical coupler.

13. These resonance-enhanced shifts of the transmitted light beam may lead to potential applications in the optical devices, such as optical switch and optical coupler.

14. A power-factor measurement instrument based on P89V51RD2 is designed, which uses optical coupler and specific LED drive chip.

15. Secondly, to deal with the problems in the experiments, the current foldback, optical coupler insulation and electromagnetic shielding were used to optimize the circuit performance of laser.

16. To deal with the problems in the experiment, the current foldback, optical coupler insulation and electromagnetic shielding was used to optimize the laser's performance.

17. An apparatus for optical body analysis is built with an illumination and detection head, and an optical coupler.

18. The characteristics, basic circuit, and working wave pattern of transistor type optical coupler and its function in electronic control unit of hydraulic discharging machine were introduced.

19. In virtue of good degree of linearity, easy isolation and high sensitivity, the detection circuit based on the linear optical coupler comes to the front and has a wide application.

20. First of all, this paper study fabricating method, coupling model, structures and performance of all kinds of optical coupler, and find the common and difference between SOF couplers and POF couplers.