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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 19 — Sep. 12, 2011
  • pp: 18364–18371

Rapidly frequency-swept optical beat source for continuous wave terahertz generation

Min Yong Jeon, Namje Kim, Sang-Pil Han, Hyunsung Ko, Han-Cheol Ryu, Dae-Su Yee, and Kyung Hyun Park  »View Author Affiliations

Optics Express, Vol. 19, Issue 19, pp. 18364-18371 (2011)

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We propose a rapidly frequency-swept optical beat source for continuous wave (CW) THz generation using a wavelength swept laser and a fixed distributed feedback (DFB) laser. The range of the sweeping bandwidth is about 17.3 nm (2.16 THz), 1541.42–1558.72 nm. The achieved side mode suppression ratio for both wavelengths within the full sweeping range is more than 45 dB. We observe CW THz signals for tunable optical beat sources using a fiber coupled CW THz measurement system to confirm the feasibility of using our frequency swept optical beat source as a CW THz radiation source. The THz output signal falls to the thermal noise level of the low-temperature grown (LTG) InGaAs photomixer beyond 1.0 THz. The rapidly frequency-swept optical beat source will be useful for generating high-speed tunable CW THz radiation.

© 2011 OSA

OCIS Codes
(140.3500) Lasers and laser optics : Lasers, erbium
(140.3600) Lasers and laser optics : Lasers, tunable
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Lasers and Laser Optics

Original Manuscript: June 13, 2011
Revised Manuscript: July 21, 2011
Manuscript Accepted: July 22, 2011
Published: September 6, 2011

Min Yong Jeon, Namje Kim, Sang-Pil Han, Hyunsung Ko, Han-Cheol Ryu, Dae-Su Yee, and Kyung Hyun Park, "Rapidly frequency-swept optical beat source for continuous wave terahertz generation," Opt. Express 19, 18364-18371 (2011)

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