Open AccessDual‐beam terahertz quantum cascade laser with >1 W effective output power
Author(s) -
Tan Zhiyong,
Wang Hongyu,
Wan Wenjian,
Cao Juncheng
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2020.1376
Subject(s) - terahertz radiation , cascade , quantum cascade laser , photomixing , physics , dual (grammatical number) , power (physics) , laser , beam (structure) , quantum , far infrared laser , laser beam quality , terahertz spectroscopy and technology , optics , terahertz metamaterials , laser beams , optoelectronics , quantum mechanics , engineering , chemical engineering , art , literature
A new coupling scheme of a 4.28‐THz quantum‐cascade laser is constructed by employing two off‐axis parabolic reflectors. Two parallel terahertz beams are coupled out from the symmetrical facets of the wire laser. The total effective laser power of the terahertz beams is measured by a thermal power‐meter under the modulation state. The highest value of the laser effective output power is about 1.4 W at a driving current of 19.3 A and a duty cycle of 1%. This dual‐beam coupling scheme makes full use of the output power of the wire laser and has important applications in terahertz imaging and biological‐effect research studies.