Compact and Portable Terahertz Source by Mixing Two Frequencies Generated Simultaneously by Single Solid-State Laser



Lehigh University has developed a compact, portable terahertz (THz) source that uses difference frequency generation (DFG) in a Gallium Selenide (GaSe) crystal by mixing dual frequencies from a single solid-state laser. Experimental results of this technology show the average THz output power can be as high as 1 μW at 1.64 THz (182 μm). This output power level is sufficiently high for applications such as THz imaging and chemical sensing. An important feature is the ability to operate at room temperature, a key advantage over potentially competitive sources that require cryogenic cooling. A prototype has been developed.


An article on this technology can be found at the following URL


Lehigh Tech ID#080110-01



Terahertz technology has a number of applications, with imaging being the largest segment at revenue over $71.8 million, increasing to over $206 million by 2018. [1] Terahertz spectroscopy is another large segment and the world market for these applications has grown to around $20 million. [2] Pharmaceutical companies spend over $800 million annually on spectroscopic equipment in the Unites States along, and of this $35 million is spend on emerging Terahertz and mm-wave spectrometers. Computing applications using Terahertz technology are also significant, reaching $13 million by 2013.

[1] “Global Market for Terahertz Radiation Systems Worth $63.2 Million in 2013.’ BCC Research, November 2008. NDT web site (accessed September 1, 2010).

[2] “Market Profile: Terahertz Spectroscopy.” Spectroscopy Online web site. (accessed September 1, 2010).



Lehigh University is interested in licensing this technology.    

App Type Country Serial No. Patent No. File Date Issued Date Expire Date
Utility United States 13/154,482 6/7/2011   9/29/2014
Patent Cooperation Treaty [PCT] United States PCT/US2011/039690 6/9/2011   8/23/2014
For Information, Contact:
Alan Snyder
VP, Research & Grad Programs
Lehigh University
Pu Zhao
Srinivasa Ragam
Yujie Ding