Overview: Optical isolator is a combination of a Polarizing Beamsplitter Cube
(PBS) and a Quartz Quarter Waveplate. Incident light is linearly
polarized by PBS and converted to circular polarization by the
quarter waveplate when light first travels through it. Any portion
of the emerging beam reflected back into the isolator and goes
through a second time of the quarter waveplate will be converted
into a linearly polarized beam which is perpendicular to the input
beam. This beam is then blocked by PBS and it will not return to
the original input path of the system.
General Specifications of Optical Isolator: | Material | Crystal Quartz & BK7 | | Dimension Tolerance | ±0.2mm | | Surface Quality | 60/40 | | Clear Aperture | >90% | | Transmitted Wavefront Distortion | <λ/4@632.8nm | | Beam Deviation | <3 arc minutes | | Isolation | >20dB | | Transmission | Tp>95%, Ts<1% | | Reflection | Rs>99%, Rp<5% | | AR Coating | R<0.25%@ central wavelength on all entrances | | Damage Threshold | >500mJ/cm2, 20ns, 20Hz @1064nm |
Standard Products of Optical Isolator:
| Part Number | Dimension A (mm) | Thickness A
(mm) | Isolation
(dB) | Wavelength (nm) | | ISO1010-532 | 10x10 | 10 | >20 | 532 | | ISO1212-532 | 12.7x12.7 | 12.7 | >20 | 532 | | ISO1010-633 | 10x10 | 10 | >20 | 633 | | ISO1212-633 | 12.7x12.7 | 12.7 | >20 | 633 | | ISO1010-780 | 10x10 | 10 | >20 | 780 | | ISO1212-780 | 12.7x12.7 | 12.7 | >20 | 780 | | ISO1010-1064 | 10x10 | 10 | >20 | 1064 | | ISO1212-1064 | 12.7x12.7 | 12.7 | >20 | 1064 | | ISO1010-1550 | 10x10 | 10 | >20 | 1550 | | ISO1212-1550 | 12.7x12.7 | 12.7 | >20 | 1550 |
Coating Graphs of Optical Isolator: 532nm Optical Isolator
| 633nm Optical Isolator
| 780nm Optical Isolator
| 1064nm Optical Isolator
| 1550nm Optical Isolator
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