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Free Space Isolator

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QQ截图20210406141537
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QQ截图20210406141537
QQ截图20210406141547
QQ截图20210406141543
  • Free Space Isolator

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Free space isolators are divided into two categories as polarization dependent isolator and polarization independent isolator.

The polarization dependent isolator, or Faraday isolator consists of three major parts which are input polarizer (polarized vertically),

Faraday Rotator, and output polarizer (aligned at 45° relative to the input polarizer).

The polarization independent isolator consists of three main components, which are birefringent beam displacer (polarizer), Faraday Rotator, half-wave plate. It's usually used for maintaining the stability of optical system effectively in the fiber laser system.

CASTECH adopts high quality crystals with low absorption and high extinction ratios, and polarizers with low transmission losses to achieve outstanding performance. Customized free space isolators are available with peak isolation up to 45dB, maximum transmittance above 95%, and aperture up to 45mm.

Polarization Reference:

•All Free Space Isolators non-reciprocally rotates the plane of polarized light in 45°.

• Extra half-wave plate for modifying output polarization is available on request.

Crystal Parameter:

Crystals Chemical
Formula
Verdet Constant
@RT
Extinction
Ratio
Laser Induced
Damage
Threshold
TGG Tb3Ga5O12 35 Rad T-1m-1 >30 dB >1 GW/cm2
TSAG Tb3Sc2Al3O12 48 Rad T-1m-1 >30 dB >1 GW/cm2
YIG Y3Fe5O12      
YVO4 YVO4 / /  
α-BBO α-BaB2O4 /    

Applications

 Laser precision machining

 Laser sensing

 Ultrafast laser system

 OCT system

 Laser detection

 

Product
Number
Type
(t)
Power
(p)
Apert
(a)ure
Wavelength
(λ)
Wave Plate
(w)
Housing
(h)
HPISO-t-p-a-λ-w-h Polarization
Dependent
AB
(Adjustable
Broadband)
≤100W 2mm
2.5mm
3mm
4mm
5mm
6mm
10mm
12mm
15mm
25mm
45mm
...
550~880nm... C
(Contained)
N
(Not Contained)
A03...
  FS
(Free Space)
532nm,633nm,780
nm,1030nm,1064n
m,1319nm,1550n
m,1990nm,2000n
m...
A04, A06, A08,
A11, A12, A45,
A46...
  DS
(Dual Stage)
A15...
  Polarization Independence 1.5mm
2mm
3mm
4mm
5mm
8mm
...
980nm,1030nm,
1064nm...
A16...
Product Number* Center
Wavelength
Power** Damage
Threshold
10ns,10Hz
Clear
Aperture
Wave
Plate
Transmittanc Peak
Isolation
HPISO-FS-p-a-λ-w-A10 532~780, 1319nm ≤10W 1J/cm² @532nm ≤3mm C/N >90% >35dB
HPISO-FS-p-a-λ-w-A04
(A05-A09)
532, 635, 690, 780,
850, 905, 980nm
≤50W 10J/cm² @532nm ≤12mm C/N >93% >35dB
HPISO-AB-p-a-λ-w-A03 550~880nm ≤100W 10J/cm² @532nm ≤10mm C/N >90% >35dB
HPISO-FS-1-1.5-λ-N-A45 532nm, 633nm ≤1W 1J/cm² @532nm ≤1.5mm N >93% >33dB
HPISO-FS-0.5-2-780-N A45 780nm ≤500mW 1J/cm² @1064nm ≤2mm N >93% >30dB
HPISO-FS-p-a-λ-w-A30 850nm ≤1W 1J/cm² @1064nm ≤3mm N >90% >30dB
HPISO-FS-p-a-λ-w-A37 1030, 1064nm ≤10W 1J/cm² @1064nm ≤2mm N >90% >35dB
HPISO-PI-p-a-λ-w-A29 1030, 1064nm ≤50W 10J/cm² @1064nm ≤8mm C >90% >35dB
HPISO-PI-p-a-λ-w-A38 1030, 1064nm ≤50W 10J/cm² @1064nm ≤1mm N >93% >35dB
HPISO-FS-p-a-λ-w-A04
(A05-A09,A23,A31)
1030, 1064nm ≤100W  10J/cm² @1064nm ≤45mm C/N >93% >35dB
HPISO-FS-p-a-λ-w-A11 1064nm ≤1W 1J/cm² @532nm ≤2mm C >75% >35dB
HPISO-FS-5-2.5-1064-N A46 1064nm ≤5W 1J/cm² @1064nm ≤2.5mm N >93% >30dB
HPISO-DS-p-a-λ-w-A14 1064nm ≤50W 10J/cm² @1064nm ≤2mm N >90% >45dB
HPISO-DS-p-a-λ-w-A15 1064nm ≤50W 10J/cm² @1064nm ≤3mm N >90% >45dB
HPISO-DS-p-a-λ-w-A28 1064nm ≤50W  10J/cm² @1064nm ≤5mm N >90% >45dB
HPISO-FS-p-a-λ-w-A12 1310, 1319,1550nm ≤50W 10J/cm² @1064nm ≤10mm C/N >93% >35dB
HPISO-FS-p-a-λ-w-A12 2000nm ≤50W 10J/cm² @1064nm ≤5mm C/N >93% >35dB
*Customized products are available.
**Indicates the maximum average power products can handle.
             

 

*Customized products are available.

**Indicates the maximum average power products can handle.

Dimensions (mm):

Housing Aperture Wave Plate A B C D E F
A04 ≤5mm N 72.5 25 48 60 22.2 45
A05 C 77.5 25 48 60 22.2 45
A06 ≤10mm N 89 34 60 92 29 58
A07 C 94.3 34 60 92 29 58
A08 ≤12mm N 116.5 50 73 100 39 76
A09 C 123.7 50 73 100 39 76
A12 ≤5mm / 43 18 34 46 17 36
A13 ≤3mm / 72.5 25 40 76 19.05 39
A23 ≤25mm N 272.4 50.8 120 172 76.2 145
A31 ≤45mm N 476.5 63.5 102 127 69.85 133.5

 

 

 

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