TITLE

Subterahertz noise signal generation using a photodetector and wavelength-sliced optical noise signals for spectroscopic measurements

AUTHOR(S)
Ho-Jin Song; Shimizu, Naofumi; Furuta, Tomofumi; Wakatsuki, Atsushi; Nagatsuma, Tadao
PUB. DATE
December 2008
SOURCE
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p241113
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present a photonic technique for generating a subterahertz time-continuous noise signal, which provides not only fine resolution and a potential for broadband measurements but also a higher output power resulting in high signal to noise ratio for the spectroscopy measurement. To increase the output noise power at subterahertz frequencies, the optical noise is sliced with the arrayed waveguide gratings (AWGs), resulting in the power level of -126.1 dBm/Hz at 350 GHz, which is approximately 17 dB higher than that without the AWGs. Using the implemented subterahertz noise signal source, we demonstrate a simple spectroscopic measurement of the H2O absorption line at around 380 GHz.
ACCESSION #
35922100

 

Related Articles

  • Organic photonics for communications. Clark, Jenny; Lanzani, Guglielmo // Nature Photonics;Jul2010, Vol. 4 Issue 7, p438 

    Photons as information carriers have the potential to meet the ever-increasing demands on bandwidth and information density in fields such as information and communication technology, biomedicine and computing. Organic semiconductors may be well-suited to such applications, thanks to their...

  • Metallic photonic crystals with strong broadband absorption at optical frequencies over wide angular range. Veronis, Georgios; Dutton, Robert W.; Shanhui Fan // Journal of Applied Physics;5/1/2005, Vol. 97 Issue 9, p093104 

    We show theoretically that a finite two-dimensional square lattice of metallic cylinders in air can be designed to have almost 100% absorptance over a wide optical wavelength range and for a wide range of incidence angles. The broadband and wide-angle strong absorption is attributed to the...

  • A three-dimensional optical photonic crystal with designed point defects. Qi, Minghao; Lidorikis, Elefterios; Rakich, Peter T.; Johnson, Steven C.; Joannopoulos, J. D.; Ippen, Erich P.; Smith, Henry L. // Nature;6/3/2004, Vol. 429 Issue 6991, p538 

    Photonic crystals offer unprecedented opportunities for miniaturization and integration of optical devices. They also exhibit a variety of new physical phenomena, including suppression or enhancement of spontaneous emission, low-threshold lasing, and quantum information processing. Various...

  • Spectral Analysis Using a New Opto-Mechanical Instrument. Jafari, R.; Golnabi, H. // Journal of Applied Sciences;2008, Vol. 8 Issue 20, p3669 

    Design and operation of an opto-mechanical system for spectral analysis using a double fiber design for light delivery are reported in this study. A simple mechanical drive system is used, which is able to perform a fine course of angular motion for the scanning of the dispersive optical...

  • Amplified dispersive Fourier-transform imaging for ultrafast displacement sensing and barcode reading. Goda, Keisuke; Tsia, Kevin K.; Jalali, Bahram // Applied Physics Letters;9/29/2008, Vol. 93 Issue 13, p131109 

    Dispersive Fourier transformation is a powerful technique in which the spectrum of an optical pulse is mapped into a time-domain waveform using chromatic dispersion. It replaces a diffraction grating and detector array with a dispersive fiber and single photodetector. This simplifies the system...

  • Single-frequency coherent terahertz-wave generation using two Cr:forsterite lasers pumped using one Nd:YAG laser. Nishizawa, Jun-ichi; Sasaki, Tetsuo; Tanabe, Tadao; Hozumi, Norimitsu; Oyama, Yutaka; Suto, Ken // Review of Scientific Instruments;Mar2008, Vol. 79 Issue 3, p036101 

    We have developed a compact terahertz-wave generator using two small Cr:forsterite lasers with single Nd:YAG laser pumping based on difference frequency generation in a GaP crystal. A Cr:forsterite laser was constructed with diffraction gratings, by which the pulse duration and delay time of the...

  • Design of a Conical Diffraction Type Plane Holographic Grating Monochromator for Use in the Energy Region of 1–4 keV. Koike, Masato; Namioka, Takeshi // AIP Conference Proceedings;2004, Vol. 705 Issue 1, p865 

    The holographic plane grating with grooves of a radial form and its imaging properties in a converging beam are analyzed. The results are applied to the design of conical diffraction monochromators for the 1–4 keV region, and their expected performances are examined by means of ray...

  • MODELING PHOTONIC CRYSTALS WITH COMPLEX UNIT CELLS BY DIRICHLET-TO-NEUMANN MAPS. Yuexia Huang; Ya Yan Lu // Journal of Computational Mathematics;May2007, Vol. 25 Issue 3, p337 

    For a photonic crystal (PhC) of finite size, it is important to calculate its transmission and reflection spectra. For two-dimensional (2-D) PhCs composed of a square lattice of circular cylinders, the problem can be solved by an efficient method based on the Dirichlet-to-Neumann (DtN) map of...

  • Tuning the polarization state of enhanced transmission in gratings. Crouse, David; Hibbins, Alastair P.; Lockyear, Matthew J. // Applied Physics Letters;5/12/2008, Vol. 92 Issue 19, p191106 

    The polarization characteristics of enhanced transmission of lamellar gratings with structural dimensions on the subwavelength scale were studied and experimental results were compared to numerical models. The ability to tune the polarization state of the transmitted beam by varying the...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics