オーテックス株式会社は、レーザー、レーザー周辺機器、光学機器を扱う専門商社です。

TEL. 03(3226)6321

〒162-0067 東京都新宿区富久町16-5新宿高砂ビル4F

テラヘルツアンテナTHz antenna



ACST UWB Quasi-optical Detectors up to 2THz

Square-low detectors based on Zero-Bias Schottky Diodes High sensitivity in ultra-wide frequency band and room-temperature operation make Schottky-barrier diode (SBD) based Quasi-optical detectors the only alternative to Golay Cell detectors for low-THz
frequency region. Bias-free operation allows for system simplicity and ultra-low noise. In contrast to Golay Cell,the SBD detectors are simpler, geometrically smaller,and much faster. The last criteria makes SBD the device of choice for many applications.


Application fields
§ Scientific instrumentation,
§ Spectroscopy,
§ Imaging,
§ High bit rate telecommunication,
§ Monitoring of short-pulse and weak THz radiation
.

ACST Quasi-optical Detectors consist on
three major parts:
1. A planar ultra-wideband antenna fed by a zero-bias
Schottky diode,
2. Optical lens,
3. Pre-amplifier.


These detectors are intrinsically very fast. For instance,
they are suitable to monitor very short THz impulses from a
synchrotron light source. An experiment done at ANKA, the
synchrotron Radiation Facility at Karlsruhe Institute of
Technology, demonstrated pulse length of just 25ps, which
was limited by reading electronics. This experiment suggest
ACST quasi optical detectors are probable one of the fastest
detectors reported to day.



Because of frequency-dependent optical beam forming,
the accurate estimation of absolute responsivity of quasi
optical detectors is not a trivial matter. Therefore,
comparative evaluation of Signal-to-Noise Ratio (SNR)
with a Golay Cell is usually practicable Figure-of-Merit for
quasi optical detectors from the user point of view. For
instance, detectors with th ehighest available RF-bandwidth
shows SNR better than of Golay Cell in frequency range up
to about 1THz, whereas at higher frequencies the Golay
Cell shows better SNR (see plots above).

Typical performance for detectors with different frequency ranges Typical packaging includes:
■ Lens: 12mm diameter, collimated.
■Polarisation: Linear or circular, depending on
used planar antenna
■Video amplifier Two versions available: DC-1MHz
bandwidth: and 10MHz-4GHz.
Detectors can also be packaged on customer specification.


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バナースペース

オーテックス株式会社

〒162-0067
東京都新宿区富久町16-5新宿高砂ビル4F
TEL 03(3226)6321
FAX 03(3226)6290

大阪支店
〒530-0004
大阪市北区堂島浜2-1-29 古河大阪ビル
TEL 06(6344)6328
FAX 06(6344)6342

テクニカルセンター
〒300-1424
茨城県稲敷市下太田4574-1