5619
the photodeflection technique or mirage method consists in periodically heating a sample with a pump laser modulated by an optical chopper .
 pump, laser
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
Answer:
 pump, laser