Description of optical isolator
Optical isolator is passive devices which can allow light to be transmitted in only one direction. Optical isolator are used to prevent any light from reflecting back down the fiber, as this light would enter the source and cause backscattering and feedback problems.
There are two major types of optical isolators: In-line optical isolator and free space optical isolator.
Free space optical isolator:Free space optical isolators, by contrast, do not have an integral connection system. They must be directly mounted to the object that needs isolation.
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Parameter
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P Grade
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A Grade
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Operating wavelength (nm)
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1310 or 1550 Or other
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Smallest isolation (dB)
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>42
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>40
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Isolation
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>28
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>26
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Inserts most greatly damages (dB)
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0.20
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0.25
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Pass the light aperture (mm)
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0.9
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Operating temperature (° C)
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-5 ~ + 65
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Storage temperature (° C)
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-40 ~ +85
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Maximum work rate (mw)
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300
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Parameter
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P Grade
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A Grade
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Operating wavelength (nm)
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1310 or 1550 Or other
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Smallest isolation (dB)
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>60
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>55
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Isolation
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>48
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>46
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Inserts most greatly damages (dB)
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0.30
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0.35
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Pass the light aperture (mm)
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0.9
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Operating temperature (° C)
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-5 ~ + 65
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Storage temperature (° C)
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-40 ~ +85
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Maximum work rate (mw)
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300
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1480nm Single / Dual stage Isolator:
Performance specification
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Product name
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1480 single stage isolator
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1480 dual stage isolator
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Parameter
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P Grade
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A Grade
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P Grade
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A Grade
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Operating wavelength (nm)
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1480
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Typical peak isolation (dB)
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42
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40
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55
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52
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Isolation minimum value *(dB)
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32
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30
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45
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44
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Insertion loss typical value (dB)
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0.4
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0.5
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0.5
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0.6
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Insertion loss maximum value(dB)
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0.6
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0.8
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0.7
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0.9
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Return loss (In/Out) (dB)
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> 65/60
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> 60/55
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> 65/60
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> 60/55
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Polarization dependent loss (dB)
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< 0.05
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< 0.1
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< 0.05
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< 0.1
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PMD (dB)
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0.2(0.05 available upon request)
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|||
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Band width (nm)
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±15
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±30
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Operating temperature(°C)
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-20 ~ + 70
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Storage temperature (°C)
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-40 ~ +85
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Fiber type
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Corning SMF-28
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Fiber length
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1 rice
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Dimensions(mm)
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Ø5.5xL35
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Power handing (mw)
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300
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1060nm Single / Dual Stage optical Isolator
Performance specification
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Product name
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1060 single stage isolator
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1060 dual stage isolator
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Parameter
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P Grade
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A Grade
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P Grade
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A Grade
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Operating wavelength (nm)
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1060
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||||
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Typical peak isolation (dB)
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40
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38
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55
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50
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Isolation minimum value *(dB)
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30
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28
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45
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40
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Insertion loss typical value (dB)
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1.5
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1.8
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2.4
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2.8
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Insertion loss maximum value (dB)
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2.0
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2.2
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3.4
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4.2
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Return loss (In/Out) (dB)
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> 50
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||||
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Polarization dependent loss (dB)
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< 0.15
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PMD (dB)
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0.20
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0.25
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0.20
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0.25
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Band width (nm)
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±15
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±30
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Operating temperature (°C)
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-20 ~ + 70
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Storage temperature (°C)
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-40 ~ +85
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Fiber type
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Corning hi 1060
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Fiber length
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1meter
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Dimensions(mm)
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Ø5.5xL35
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L-Band Single / Dual Stage Isolator
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Parameter
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Single stage optical isolator
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Dual stage optical isolator
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Grade
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P
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A
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P
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A
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Operating wavelength (nm)
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1310 or 1550
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|||
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Typical peak isolation (dB) (23°C)
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>42
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>40
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>52
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>50
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Minimum value isolation * (dB) (23°C)
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>32
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>30
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>46
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>45
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Insertion loss typical value ** (dB)
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0.3
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0.4
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0.4
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0.5
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Insertion loss maximum value *** (dB)
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<0.5
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<0.7
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<0.6
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<0.8
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Return loss (In/Out) (dB)
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>65/60
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>60/55
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>65/60
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>60/55
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PDL (dB)
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< 0.05
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< 0.1
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< 0.05
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< 0.1
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PMD (dB)
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0.2(0.05 available upon request)
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|||
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Band width (nm)
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±15
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±30
|
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Operating temperature (°C)
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-20 ~ + 70
|
|||
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Storage temperature (°C)
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-40 ~ +85
|
|||
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Fiber type
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Corning SMF-28
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Fiber length
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1m
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Dimensions(mm)
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5.5×30
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Power handing (mw)
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300
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Polarization-sensitive single/dual stage optical isolator
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Parameter
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Single stage optical isolator
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Dual stage optical isolator
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Grade
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P
|
A
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P
|
A
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Operating wavelength (nm)
|
1310 or 1550
|
|||
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Typical peak value isolation (dB) (23°C)
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>42
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>40
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>52
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>50
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Minimum value isolation * (dB) (23°C)
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>32
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>30
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>46
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>45
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Insertion loss typical value ** (dB)
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0.3
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0.4
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0.4
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0.5
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Insertion loss maximum value *** (dB)
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<0.5
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<0.7
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<0.6
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<0.8
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Return loss (In/Out) (dB)
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>65/60
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>60/55
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>65/60
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>60/55
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PDL (dB)
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< 0.05
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< 0.1
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< 0.05
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< 0.1
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PMD (dB)
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0.2(0.05 available upon request)
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|||
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Band width (nm)
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±15
|
±30
|
||
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Operating temperature (°C)
|
-20 ~ + 70
|
|||
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Storage temperature (°C)
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-40 ~ +85
|
|||
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Fiber type
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Corning SMF-28
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|||
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Fiber length
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1m
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|||
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Dimensions(mm)
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5.5×30
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|||
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Power handing (mw)
|
300
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Pigtail optical Isolator
Parameter |
Premium |
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Operating Wavelength (nm) |
1310 ~ 1550 |
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Isolation(@23°C) (dB) |
>30 |
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Insertion Loss(@23°C (dB) (Without Connector) |
<0.30 |
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Outer Diameter (mm) |
F2.5 |
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Capillary End Angle (°) |
6~8 |
| Fiber Type |
F0.9mm SMF-28
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| Connector Type |
FC; SC; ST; LC
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Operating Temperature (° C) |
-20 to + 70 |
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Storage Temperature (° C) |
-40 to +85 |
High Power optical Isolator
|
Stage |
Single Stage |
Dual Stage |
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Operating Wavelength (nm) |
1310 or 1550 |
|
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Typical Peak Isolation (dB) |
42 |
55 |
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Minimum Isolation * (dB) |
32 |
42 |
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Typical Insertion Loss** (dB) |
0.5 |
0.65 |
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Maximum Insertion Loss*** (dB) |
0.7 |
0.8 |
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Return loss (In/Out) (dB) |
>60/55 |
>60/55 |
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PDL (dB) |
<0.05 |
<0.1 |
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PMD (dB) |
0.2(0.05 available upon request) |
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Bandwidth (nm) |
15 |
30 |
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Operating Temperature (° C) |
-20 ~ + 70 |
|
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Storage Temperature (° C) |
-40 ~ +85 |
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Fiber Type |
Corning SMF-28 |
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Fiber Length (Min.) |
1 meter each end |
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Package Dimension (mm) |
Ø 5.5xL34(L38 for 900um Jacket) |
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Power Handling (mW) |
2000 |
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Fiber Isolator application
Fiber isolators are used in many fiber optic applications in corporate, industrial, and laboratory settings. They are reliable devices when used in conjunction with fiber optic amplifiers, fiber optic ring lasers, fiber optic links in CATV applications, and high-speed and coherent fiber optic communication systems. Single polarization fiber optic isolators are also used with laser diodes, gyroscopic systems, fiber optic modular interfaces, and a variety of other mechanical control and testing applications