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In their study , ytterbium fibre laser with a wavelength of 1065 nm was used to process the 316L stainless steel powder .
 concept or principle: fibre laser; concept or principle: wavelength; concept or principle: process; material: 316L stainless steel powder
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: fibre laser; concept or principle: wavelength; concept or principle: process; material: 316L stainless steel powder