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Photoelastic modulators
Photoelastic modulators
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D32
  • Photoelastic modulators

  • Photoelastic modulator is applied for changing the polarization state of light, and makes the transmitted light have a dynamic phase retardation. CASTECH offers one- and two-dimensional categories.
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Product description:

Photoelastic modulator is applied for changing the polarization state of light, and make the transmitted light have a dynamic phase retardation. The light-passing part of the device is made of isotropic material, which periodically vibrates at an inherent resonant frequency. The refractive index of the optical material will change periodically due to the photoelastic effect, which changes the phase retardation of the incident light. CASTECH's photoelastic modulator has the advantages of wide receiving angle, large clear aperture, wide wavelength range, high modulation frequency and high precision.

According to the working mode, photoelastic modulators can be divided into two categories: one-dimensional and two-dimensional.

The one-dimensional photoelastic modulator has only one vibration dimension and is applicable for ultraviolet, visible and near-infrared wavebands.

The two-dimensional photoelastic modulator has two vibration dimensions, can achieve a larger range of phase modulation, and is mainly used in visible and infrared wavebands.

 

Applications:

●Polarization measurement    

● Quantum sensing    

●Spectrometer

●Astronomical observation    

● Magnetometer

 

 

     

 

Photoelastic principle                                                                               Phase retardation


 

 

 

Model Number:CPEM-f-a-m-t-h

Frequency

(f)

Clear aperture

(a)

Material

(m)

Type

(t)

Housing

(h)

50(50kHz)

60(60kHz)

84(84kHz)

...

13(13mm)

14(14mm)

16(16mm)

22(22mm)

...

FS

(fused silica )

CF

(calcium fluoride)

ZS

(zinc selenide)

...

1

(One-dimensional)

2

(Two-dimensional)

A01

A02

A03

A04

...

 

 

Typical Specifications*

Frequency

Type

Maximum Clear Aperture

Transmission

Acceptance Angle

50kHz

One-dimensional

16mm

≥98%

20°

60kHz

One-dimensional

13mm

≥98%

20°

50kHz

Two-dimensional

22mm

≥98%

20°

60kHz

Two-dimensional

13mm

≥98%

20°

*Wavelengths range 532-1100nm

 

Housing dimensions(mm):

A01                                                                                                                          A02

        

 

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