title: The method of pulsed x-ray detection with a diode laser.
abstract: A new class of pulsed X-ray detection methods by sensing carrier changes in a diode laser cavity has been presented and demonstrated. The proof-of-principle experiments on detecting pulsed X-ray temporal profile have been done through the diode laser with a multiple quantum well active layer. The result shows that our method can achieve the aim of detecting the temporal profile of a pulsed X-ray source. We predict that there is a minimum value for the pre-bias current of the diode laser by analyzing the carrier rate equation, which exists near the threshold current of the diode laser chip in experiments. This behaviour generally agrees with the characterizations of theoretical analysis. The relative sensitivity is estimated at about 3.3 × 10-17C ⋅ cm2. We have analyzed the time scale of about 10 ps response with both rate equation and Monte Carlo methods.
authors.affiliation: College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China.
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Ouyang
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Zhongbing
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Sheng
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Xinjian
authors.initials: X
authors.lastname: Tan
authors.affiliation: Northwest Institute of Nuclear Technology, Xi'an 710024, China.
authors.forename: Xiufeng
authors.initials: X
authors.lastname: Weng