Compact fiber-pigtailed InGaAs photoconductive antenna module for terahertz-wave generation and detection

• DOI: 10.1364/oe.20.018432
• Publication Date: 2012-07-28T06:56:25Z
• Authors: Sang-Pil Han; Namje Kim; Hyunsung Ko; Han-Cheol Ryu; Jeong-Woo Park; Young-Jong Yoon; Jun-Hwan Shin; Dong Hun Lee; Sang-Ho Park; Seok-Hwan Moon; Sung-Wook Choi; Hyang Sook Chun; Kyung Hyun Park
• Keywords: 0103 physical sciences; 01 natural sciences; 7. Clean energy

We propose a compact fiber-pigtailed InGaAs photoconductive antenna (FPP) module having an effective heat-dissipation solution as well as a module volume of less than 0.7 cc. The heat-dissipation of the FPP modules when using a heat-conductive printed circuit board (PCB) and an aluminium nitride (AlN) submount, without any cooling systems, improve by 40% and 85%, respectively, when compared with a photoconductive antenna chip on a conventional PCB. The AlN submount is superior to those previously reported as a heat-dissipation solution. Terahertz time-domain spectroscopy (THz-TDS) using the FPP module perfectly detects the absorption lines of water vapor in free space and an α-lactose sample.