利用啁啾和延迟激光脉冲在周期极化铌酸锂中产生窄带太赫兹波。

Narrowband terahertz generation with chirped-and-delayed laser pulses in periodically poled lithium niobate.

作者信息

Ahr Frederike, Jolly Spencer W, Matlis Nicholas H, Carbajo Sergio, Kroh Tobias, Ravi Koustuban, Schimpf Damian N, Schulte Jan, Ishizuki Hideki, Taira Takunori, Maier Andreas R, Kärtner Franz X

出版信息

Opt Lett. 2017 Jun 1;42(11):2118-2121. doi: 10.1364/OL.42.002118.

DOI:10.1364/OL.42.002118

PMID:28569860

Abstract

We generate narrowband terahertz (THz) radiation in periodically poled lithium niobate (PPLN) crystals using two chirped-and-delayed driver pulses from a high-energy Ti:sapphire laser. The generated frequency is determined by the phase-matching condition in the PPLN and influences the temporal delay of the two pulses for efficient terahertz generation. We achieve internal conversion efficiencies up to 0.13% as well as a record multicycle THz energy of 40 μJ at 0.544 THz in a cryogenically cooled PPLN.

摘要

我们使用来自高能钛宝石激光器的两个啁啾和延迟驱动脉冲，在周期性极化铌酸锂（PPLN）晶体中产生窄带太赫兹（THz）辐射。产生的频率由PPLN中的相位匹配条件决定，并影响两个脉冲的时间延迟，以实现高效的太赫兹产生。在低温冷却的PPLN中，我们实现了高达0.13%的内转换效率，以及在0.544太赫兹时创纪录的40微焦多周期太赫兹能量。