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Terahertz photoconductive switch modules

G10620

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G10620 series are terahertz(THz) electromagnetic waves emission/detection modules, in which a low-temperature-grown GaAs(LT-GaAs) based photoconductive switch(sometimes called as photoconductive antenna) and a lens for THz electromagnetic wave are integrated.
Small size(30 mm × 30 mm × 13 mm except the protuberance) helps easy installation in a system. This module also has a SMA connector, which facilitates easy connection to other equipments. M6 and M2 tapping holes are prepared on three faces to help easy setup.
There are three prepared electrode patterns of photoconductive switches; Dipole:G10620-11 and Bow-tie:G10620-12, and Spiral:G10620-13.

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Features

  • Suitable for both emission and detection
  • Small size module helps easy installation
    small as 30 mm× 30 mm×13 mm
  • Easy connection to other devices
    SMA connector facilities the connection with other equipments

Applications

  • Far-infrared spectroscopy
  • Material analysis
  • Nondestructive and non-contact inspection
  • Structure inspection
  • Security, etc.

Prepared patterns

Prepared electrode patterns of photoconductive switch / schematic figure of photoconductive part

Dipole
G10620-11

l_thz-a_pp1_sc_xx

Bow-tie
G10620-12

 

l_thz-a_pp2_sc_en

Spiral
G10620-13

l_thz-a_pp3_sc_en

Measurement results

A example of experimental setup

l_thz-a_es_sc_en

 

Typical measurement results of frequency spectrum

*These are typical measurement results. Under improper experimental conditions, the similar results cannot be obtained.
*To acquire these data, a pair of pallaboloidal mirrors are used between emission and detection modules.

●G10620-11 emitter: 5 mW, receiver: 5 mW

l_thz-a_mr1_sc_xx

●G10620-12 emitter: 5 mW, receiver: 5 mW

l_thz-a_mr2_sc_xx

Absolute maximum ratings

 
Parameter Symbol Value Unit
Applied voltage *1) Vop ±15 V
Average input optical power *2) *3) *4) Pave 15 mW
Operating temperature *5) Top(c) +5 to +35
Storage temperature *5) Tstg -20 to +40

*1) Recommended value is ±10 V
*2) Recommended value is 10 mW
*3) The beam diameter on the chip surface should be larger than 10 μm(1/e2).
*4) Use a femtosecond laser with repetition rate from 50 MHz to 150 MHz.
*5) No condensation.

Dimensional outline (unit: mm)

l_thz-a_g10620_do_en

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