Traditional high-speed 100 G lasers are generally by rectangular kovar alloy shells,also known as BOX packaging,which has high cost.Emerging single-wavelength 100 G lasers are gradually adopting coaxial packaging,which can reduce material costs by about 50%.However,due to the integrated refrigerator inside the coaxial pack-age and the use of a single lens solution,there are tolerances for the above two in mass production.There are toler-ances and uncertainties in the optical path control,resulting in differences in the size and structure of the laser's ap-pearance.This leads to matching issues during the assembly of the later optical modules,resulting in higher defect rates and higher costs of batch production control.In this study,the relationship between laser length and positional tolerance was analyzed through theoretical analysis and ZMAX simulations.The coupling efficiency was discussed in relation to the trends and control methods of laser length and positional tolerance.Experimental verification of laser packaging was conducted based on the theoretical analysis and simulation results.Furthermore,control methods and solutions for laser length and positional tolerance were proposed,which have guiding significance for improving laser coupling efficiency,reducing costs,and increasing production efficiency in actual batch production.
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