Single shot autocorrelator for measuring the duration of an ultrashort pulse in the far field

US11086192B2 · kind B2 · utility

Assignee

• Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences · CN

Inventors

• Jianwei Yu · Plainsboro, US
• Jianqiang Zhu · Zhejiang, CN
• Xiaoping Ouyang · Shanghai, CN
• Baoqiang Zhu · Shanghai, CN
• Peiying Zeng · Shanghai, CN
• Xiaoyun Tang · Shanghai, CN

Key dates

• Filing date: Mar 15, 2019
• Grant date: Aug 10, 2021
• Expiry date: Oct 3, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2001/448
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A single shot autocorrelator for measuring duration of an ultrashort laser pulse in the far field, having a beam splitter to form two beams from an input ultrashort pulse: the reflected beam is firstly reflected by two mirrors mounted on a translation stage for adjusting time delay and subsequently a third mirror, and after focused by a spherical convex lens, enters a naturally grown strontium barium niobate crystal along the crystal z axis; the transmitted beam is firstly focused by a spherical convex lens, and after reflected by two mirrors, enters the crystal along the crystal z axis from opposite direction. The crystal is in the common focal regions of two spherical convex lenses and generates the transverse second harmonic pulse beam that is the autocorrelation signal to be recorded, which is imaged with an optical microscope onto a charge coupled device camera mounted perpendicular to the beams.