US 12,392,667 B2
Measuring device and measuring method
Chih-Wei Luo, Hsinchu (TW); Yi-Chen Liu, Dongshan Township (TW); and Tien-Tien Yeh, Hsinchu (TW)
Assigned to NATIONAL YANG MING CHIAO TUNG UNIVERSITY, Hsinchu (TW)
Filed by National Yang Ming Chiao Tung University, Hsinchu (TW)
Filed on Apr. 11, 2023, as Appl. No. 18/133,250.
Application 18/133,250 is a division of application No. 17/484,563, filed on Sep. 24, 2021, granted, now 11,733,103.
Application 17/484,563 is a division of application No. 16/165,625, filed on Oct. 19, 2018, granted, now 11,169,031, issued on Nov. 9, 2021.
Claims priority of application No. 107118023 (TW), filed on May 25, 2018.
Prior Publication US 2023/0258504 A1, Aug. 17, 2023
Int. Cl. G01J 11/00 (2006.01)
CPC G01J 11/00 (2013.01) 12 Claims
OG exemplary drawing
 
1. An optical pulse measuring method, measuring an optical pulse generated from a pulsed light source, including:
splitting the optical pulse and then focusing the split optical pluses at a measuring point, so as to generate gas plasma and autocorrelation with the split optical pulses, wherein an energy density of the split optical pulses is lower than a breakdown threshold of air;
receiving sound from the gas plasma and generating a plasma sound signal; and
using the plasma sound signal to calculate the characteristics of the optical pulse.