Patent ID: 6795480
Filing Date: 2004-09-21
Classification: H01S

Abstract:
A semiconductor laser device comprisinga semiconductor multi-layer film formed by laminating optical confinement layers and active layers so as to dispose each of said active layers between said optical confinement layers; a high reflection film coated on a first end of the multi-layer film perpendicular to junction planes of the individual layers in said semiconductor multi-layer film; and a low reflection film coated on a second end of the multi-layer film opposite to the first end and comprising essentially Al2O3 having a resistivity of 1Ã—1012 &OHgr;Â·m or more, wherein the semiconductor laser device has a fault in time (FIT) number of approximately 1000 or less when calculated using the formula: FIT=(fault numberÃ—109)/(operating timeÃ—operating number).