METHOD FOR DETECTING INFLUENCE ON LASER FROM back-reflection LIGHT OF LASER AND DETECTION DEVICE

摘要

The present invention discloses a method for detecting influence on a laser from back-reflected light of the laser and a detection device. The method includes: receiving laser light input by a laser; splitting the input light into first detection light and second detection light via a beam coupler having a specific distribution proportion, and outputting the first detection light and the second detection light to a first optical power meter and an adjustable reflector, respectively; receiving a part of the second detection light reflected by the adjustable reflector, splitting the part of the second detection light reflected by the adjustable reflector into first back-reflection light and second back-reflection light, and returning the first back-reflection light and the second back-reflection light to the laser and the first optical power meter, respectively, detecting power of the first detection light by using the first optical power meter, and detecting power of the second back-reflection light by using a second optical power meter, and calculating power of the input light of the laser and power of the first back-reflection light, and establishing a power corresponding relationship between the power of the first back-reflection light and the power of the input light of the laser. By means of the foregoing manner, the present invention can detect a corresponding relationship between power of back-reflection light and power of input light of a laser.

主权项

1. A method for detecting influence on a laser from back-reflected light of the laser, comprising:
receiving laser light input by a laser; splitting the input light into first detection light and second detection light, and outputting the first detection light and the second detection light to a first optical power meter and an adjustable reflector, respectively, where the power of the first detection light and power of the input light satisfy a first predetermined relationship; receiving a part of the second detection light reflected by the adjustable reflector, splitting the part of the second detection light reflected by the adjustable reflector into first back-reflection light and second back-reflection light, and returning the first back-reflection light and the second back-reflection light to the laser and the first optical power meter, respectively, where the power of the second back-reflection light and power of the first back-reflection light satisfy a second predetermined relationship; detecting the power of the first detection light by using the first optical power meter, and detecting the power of the second back-reflection light by using a second optical power meter; calculating the power of the input light of the laser according to the power of the first detection light, calculating the power of the first back-reflection light according to the power of the second back-reflection light, and establishing and outputting a power corresponding relationship between the power of the first back-reflection light and the power of the input light of the laser; and rotating the adjustable reflector for N−1 times, to enable the adjustable reflector to be located at N different reflection angles to reflect a part of the first detection light, so as to output N power corresponding relationships, wherein N is natural number greater than or equal to 2.