【摘 要】
：
The national standard of length in Japan changed to a femtosecond optical frequency comb(FOFC)in July 2009.The center frequency of the FOFC standard is 1560
【机 构】
：
NagaokaUnivofTechnologyJapan
【出 处】
：
2016年第二届光子学与光学工程国际会议暨第八届西部光子学会议
论文部分内容阅读
The national standard of length in Japan changed to a femtosecond optical frequency comb(FOFC)in July 2009.The center frequency of the FOFC standard is 1560 nm,which is in the transmission band(C-band)of the communication optical fiber.Thanks to this fact,through the communication fiber networks,an FOFC can be delivered to everywhere at anytime.That means everyone at everywhere may access the high-accuracy length standard via communication fiber networks at anytime.An FOFC is a stabilized pulse laser.In other words,an FOFC is a phase-coherent combination of several hundreds of thousands of wavelengths.Therefore,this fact means that there are several hundreds of thousands of different wavelengths and their combination,adjacent pulse repetition interval length(APRIL),which can be used as a length scale.Based on this idea,we proposed the APRILbased method.APRIL-based length measurement method uses an APRIL(the physical length associated with the pulse repetition period)as a ruler for measuring distance.
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