0

Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Design and characterization of optical-THz phase-matched traveling-wave photomixers

[+] Author Affiliations
Shuji Matsuura

California Institute of Technology (Japan)

Geoffrey A. Blake

California Institute of Technology (USA)

Rolf A. Wyss, John C. Pearson

Jet Propulsion Lab. (USA)

Christoph Kadow, Andrew W. Jackson, Arthur C. Gossard

Univ. of California/Santa Barbara (USA)

Proc. SPIE 3795, Terahertz and Gigahertz Photonics, 484 (November 12, 1999); doi:10.1117/12.370198
Text Size: A A A
From Conference Volume 3795

  • Terahertz and Gigahertz Photonics
  • R. Jennifer Hwu; Ke Wu
  • Denver, CO | July 18, 1999

abstract

Design and characterization of optical-THz phase-matched traveling-wave photomixers for difference-frequency generation of THz waves are presented. A dc-biased coplanar stripline fabricated on low-temperature-grown GaAs is illuminated by two non-collinear laser beams which generate moving interference fringes that are accompanied by THz waves. By tuning the offset angle between the two laser beams, the velocity of the interference fringe can be matched to the phase velocity of the THz wave in the coplanar stripline. The generated THz waves are radiated into free space by the antenna at the termination of the stripline. Enhancement of the output power was clearly observed when the phase-matching condition was satisfied. The output power spectrum has a 3-dB bandwidth of 2 THz and rolls off as approximately 9 dB/Oct which is determined by the frequency dependent attenuation in the stripline, while the bandwidth of conventional photomixer design has the limitation by the RC time constant due to the electrode capacitance. The device can handle the laser power of over 380 mW, which is 5 times higher than the maximum power handring capability of conventional small area devices. The results show that the traveling-wave photomixers have the potential to surpass small area designs, especially at higher frequencies over 1 THz, owing to their great thermal dissipation capability and capacitance-free wide bandwidth.

© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Shuji Matsuura ; Geoffrey A. Blake ; Rolf A. Wyss ; John C. Pearson ; Christoph Kadow, et al.
"Design and characterization of optical-THz phase-matched traveling-wave photomixers", Proc. SPIE 3795, Terahertz and Gigahertz Photonics, 484 (November 12, 1999); doi:10.1117/12.370198; http://dx.doi.org/10.1117/12.370198


Access This Article
Sign In to Access Full Content
Please Wait... Processing your request... Please Wait.
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
 

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement

Buy this article ($18 for members, $25 for non-members).
Sign In