Compact, portable, and widely-tunable THz source based on intracavity frequency mixing inside Nd:LSB laser: a novel approach

基于 Nd:LSB 激光器腔内混频的紧凑、便携式、广泛可调的太赫兹源：一种新颖的方法

• 批准号: 0925054
• 负责人: Yujie Ding
• 金额: $ 28.98万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0925054&HistoricalAwards=false
• 关键词: Compact; portable; widely; tunable; THz

Objective:The objective of this program is to implement a compact, portable, and widely-tunable THz source based on intracavity frequency mixing in a GaP crystal inside a dual-frequency Nd:LSB laser at the laser wavelengths of around 1 µm. Nd:LSB is probably one of very few lasers emitting radiation around 1 µm with a sufficiently wide bandwidth.Therefore, by placing a GaP crystal inside a Nd:LSB laser, such a system can be used for efficiently generating THz waves tunable within a wide wavelength range. Such a THz source will be working at room temperature. There is no other THz source which can compete with such a proposed THz source.Intellectual merit:The intellectual merit is based on a potentially transformative concept. It is one of the most efficient approaches to date since the peak intensities of the mixing beams inside such a solid-state laser are among the highest. The proposed approach is superior to all other frequency-mixing processes regardless of intracavity or outercavity, in terms of the performance of the THz source.Broader impacts:The broader impacts are the possible participation of a minority or female student for conducting the proposed research, integration of the research results obtained during the funding period into three demos for classroom teaching, labs for undergraduate and graduate students, high-school student summer camps, and annual campus recruitment events, and new eras for the applications of THz waves to be driven by the compact, portable, and widely-tunable THz source.

目的：本计划的目标是实现一个紧凑，便携式，宽调谐的太赫兹源的基础上腔内混频的GaP晶体内的双频Nd：LSB激光器在激光波长约为1 µm。Nd：LSB可能是极少数能够发射1 µm左右的宽带宽辐射的激光器之一。因此，通过在Nd：LSB激光器中放置GaP晶体，这种系统可以用于有效地产生在宽波长范围内可调谐的THz波。这样的THz源将在室温下工作。没有其他的太赫兹源可以与这样一个提议的太赫兹源竞争。知识价值：知识价值是基于一个潜在的变革性概念。这是迄今为止最有效的方法之一，因为这种固态激光器内部的混合光束的峰值强度是最高的。就太赫兹源的性能而言，无论是腔内还是外腔，所提出的方法都上级于所有其他混频过程。更广泛的影响是少数民族或女性学生可能参与进行拟议的研究，将资助期间获得的研究成果整合到课堂教学，本科生和研究生实验室，高中生夏令营和年度校园招聘活动的三个演示中，以及由紧凑，便携，和宽调谐太赫兹源。