Laser device with optical isolator
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United States of America Patent
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Jan 9, 2018
Grant Date -
Oct 26, 2017
app pub date -
Sep 2, 2016
filing date -
Apr 25, 2016
priority date (Note) -
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Abstract
Disclosed herein is a technology of effectively interrupting light reflected from a wavelength selective filter so as not to be fed back to a laser diode chip in a semiconductor laser package having a function of adjusting a relative intensity ratio of a signal of “1” and a signal of “0” using an optical filter. Since an optical interruption device according to the present invention may effectively interrupt a light feedback to the laser diode chip by adjusting characteristics of a 45 degree partial reflection mirror in an existing TO-can type laser device having the 45 degree partial reflection mirror and additionally disposing one λ/4 waveplate, unlike an optical isolator according to the related art using an existing Faraday rotator, the signals of “1” and “0” may be effectively adjusted in a TO-can type laser device having a small volume, thereby improving a function of communication.
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