Optical isolator

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. 

  

Single stage free space isolator
 
Parameter
P Grade
A Grade
Operating wavelength (nm)
1310 or 1550 Or other
Smallest isolation (dB)
>42
>40
Isolation
>28
>26
Inserts most greatly damages (dB)
0.20
0.25
Pass the light aperture (mm)
0.9
Operating temperature (° C)
-5 ~ + 65
Storage temperature (° C)
-40 ~ +85
Maximum work rate (mw)
300
 
Two-stage free space isolator
Parameter
P Grade
A Grade
Operating wavelength (nm)
1310 or 1550 Or other
Smallest isolation (dB)
>60
>55
Isolation
>48
>46
Inserts most greatly damages (dB)
0.30
0.35
Pass the light aperture (mm)
0.9
Operating temperature (° C)
-5 ~ + 65
Storage temperature (° C)
-40 ~ +85
Maximum work rate (mw)
300
 

1480nm Single / Dual stage Isolator:

Performance specification

Product name
1480 single stage isolator
1480 dual stage isolator
Parameter
P Grade
A Grade
P Grade
A Grade
Operating wavelength (nm)
1480
Typical peak isolation (dB)
42
40
55
52
Isolation minimum value *(dB)
32
30
45
44
Insertion loss typical value (dB)
0.4
0.5
0.5
0.6
Insertion loss maximum value(dB)
0.6
0.8
0.7
0.9
Return loss (In/Out) (dB)
> 65/60
> 60/55
> 65/60
> 60/55
Polarization dependent loss (dB)
< 0.05
< 0.1
< 0.05
< 0.1
PMD (dB)
0.2(0.05 available upon request)
Band width (nm)
±15
±30
Operating temperature(°C)
-20 ~ + 70
Storage temperature (°C)
-40 ~ +85
Fiber type
Corning SMF-28
Fiber length
1 rice
Dimensions(mm)
Ø5.5xL35
Power handing (mw)
300
* At 23° C over bandwidth

1060nm Single / Dual Stage optical Isolator

Performance specification

Product name
1060 single stage isolator
1060 dual stage isolator
Parameter
P Grade
A Grade
P Grade
A Grade
Operating wavelength (nm)
1060
Typical peak isolation (dB)
40
38
55
50
Isolation minimum value *(dB)
30
28
45
40
Insertion loss typical value (dB)
1.5
1.8
2.4
2.8
Insertion loss maximum value  (dB)
2.0
2.2
3.4
4.2
Return loss (In/Out) (dB)
> 50
Polarization dependent loss (dB)
< 0.15
PMD (dB)
0.20
0.25
0.20
0.25
Band width (nm)
±15
±30
Operating temperature (°C)
-20 ~ + 70
Storage temperature (°C)
-40 ~ +85
Fiber type
Corning hi 1060
Fiber length
1meter
Dimensions(mm)
Ø5.5xL35
           

L-Band Single / Dual Stage Isolator

l band isolator

Performance specification for L-Band Single / Dual Stage Isolator
Parameter
Single stage optical isolator
Dual stage optical isolator
Grade
P
A
P
A
Operating wavelength (nm)
1310 or 1550
Typical peak isolation (dB) (23°C)
>42
>40
>52
>50
Minimum value isolation * (dB) (23°C)
>32
>30
>46
>45
Insertion loss typical value ** (dB)
0.3
0.4
0.4
0.5
Insertion loss maximum value *** (dB)
<0.5
<0.7
<0.6
<0.8
Return loss (In/Out) (dB)
>65/60
>60/55
>65/60
>60/55
PDL (dB)
< 0.05
< 0.1
< 0.05
< 0.1
PMD (dB)
0.2(0.05 available upon request)
Band width (nm)
±15
±30
Operating temperature (°C)
-20 ~ + 70
Storage temperature (°C)
-40 ~ +85
Fiber type
Corning SMF-28
Fiber length
1m
Dimensions(mm)
5.5×30
Power handing (mw)
300
 

Polarization-sensitive single/dual stage optical isolator

free space isolator

Performance specifications for Polarization-sensitive single/dual stage isolator
Parameter
Single stage optical isolator
Dual stage optical isolator
Grade
P
A
P
A
Operating wavelength (nm)
1310 or 1550
Typical peak value isolation (dB) (23°C)
>42
>40
>52
>50
Minimum value isolation * (dB) (23°C)
>32
>30
>46
>45
Insertion loss typical value ** (dB)
0.3
0.4
0.4
0.5
Insertion loss maximum value *** (dB)
<0.5
<0.7
<0.6
<0.8
Return loss (In/Out) (dB)
>65/60
>60/55
>65/60
>60/55
PDL (dB)
< 0.05
< 0.1
< 0.05
< 0.1
PMD (dB)
0.2(0.05 available upon request)
Band width (nm)
±15
±30
Operating temperature (°C)
-20 ~ + 70
Storage temperature (°C)
-40 ~ +85
Fiber type
Corning SMF-28
Fiber length
1m
Dimensions(mm)
5.5×30
Power handing (mw)
300
 

Pigtail optical Isolator

pigtail isolator 

 

Parameter

Premium

Operating Wavelength (nm)

1310 ~ 1550

Isolation(@23°C) (dB)

>30

Insertion Loss(@23°C (dB) (Without Connector)

<0.30

Outer Diameter (mm)

F2.5

Capillary End Angle (°)

6~8

Fiber Type
F0.9mm SMF-28
Connector Type
FC; SC; ST; LC

Operating Temperature (° C)

-20 to + 70

Storage Temperature (° C)

-40 to +85

 

High Power optical Isolator

high power isolator



Stage

Single Stage

Dual Stage

Operating Wavelength (nm)

1310 or 1550

Typical Peak Isolation (dB)

42

55

Minimum Isolation * (dB)

32

42

Typical Insertion Loss** (dB)

0.5

0.65

Maximum Insertion Loss*** (dB)

0.7

0.8

Return loss (In/Out) (dB)

>60/55

>60/55

PDL (dB)

<0.05

<0.1

PMD (dB)

0.2(0.05 available upon request)

Bandwidth (nm)

15

30

Operating Temperature (° C)

-20 ~ + 70

Storage Temperature (° C)

-40 ~ +85

Fiber Type

Corning SMF-28

Fiber Length (Min.)

1 meter each end

Package Dimension (mm)

Ø 5.5xL34(L38 for 900um Jacket)

Power Handling (mW)

2000


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

Bookmark and Share