JPS6279208U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the main parts of a conventional self-aligning device for optical fibers, and FIGS.
Figures 8 and 8 all relate to this invention, Figure 2 is a perspective view of essential parts showing one embodiment of a self-aligning device, and Figures 3 and 4 are a device that can swing in the X direction and Y direction, respectively. A side view of the guide block, Fig. 5 is a characteristic diagram of the piezoelectric element, Fig. 6 is an overall block circuit diagram, Fig. 7 is an electric circuit diagram showing an example of a synchronous detection circuit, and Fig. 8 is a sine wave diagram in Fig. 7. Figure 9 is a voltage waveform diagram of the main part when the signal inputs A and B are in phase. Figure 9 is a voltage waveform diagram of the main part when the signal inputs are in opposite phase. Figure 10 is an implementation of the optical power comparator in Figure 6. Schematic diagram showing an example,
Figures 11 and 12 show the voltage waveforms of the main parts in Figure 10. Figure 11 is a waveform diagram when the optical power is above a certain level, and Figure 12 is a waveform diagram when the optical power is below a certain level. be. Fig. 13 is a circuit diagram showing an example of an adder circuit, Fig. 14 is a circuit diagram showing an example of a semiconductor switch, Fig. 15 is a flowchart showing the overall operation process, and Fig. 16 is a waveform of the voltage applied to the actuator. 17 is a graph showing the relationship between the output voltage of the optical power meter and the adjustment position of the guide block, and FIG. 18 is a side view showing another embodiment of the actuator. 4, 4... Optical fiber, 9, 10... Guide block, 11, 12... Actuator, 14a... Optical sensor, 14b... Optical power meter, 14... Optical power measuring device, 16... Polarity determination circuit, 17... Optical power comparator , 18... microcomputer, 21,
22...Addition circuit, 23, 24...Semiconductor switch,
25...Oscillator.

Claims (1)

[Scope of Claim for Utility Model Registration] A guide block on which an optical fiber can be placed and supported on a base so as to be swingable in the vertical direction, and an optical fiber supported on the base so as to be swingable in the left and right directions. a pair of voltage-driven actuators that are directly connected to each guide block and move vertically or horizontally as a result of applied voltage; a DC power source, an AC power source, and a bias voltage. an application circuit that superimposes a DC voltage from a DC power supply and an AC voltage from an AC power supply and applies the superposed voltage to each actuator separately; a measurement circuit that measures optical power passing through opposing end faces of the optical fiber to be connected; a comparison circuit that compares the phase of the vibration of the optical power and the vibration of the actuator; an adjustment circuit that changes a bias voltage so as to move the actuator in a forward or reverse direction based on the phase comparison; and an adjustment circuit that changes the amplitude of the vibration of the optical power. A self-aligning device for an optical fiber, comprising a control circuit that stops the guide block at that position when the value falls below a certain value.