Polarization Maintaining Fibers
![PM Fiber PM Fiber](/fileadmin/_processed_/1/2/csm_pm-fiber-26-37_98f40f7cb0.png)
![PM Fiber PM Fiber](/fileadmin/_processed_/1/2/csm_pm-fiber-26-37_4d9f4ecd4b.png)
Due to the bow-tie design, the polarization of coupled light (488 nm to 1550 nm) remains stable in polarization-maintaining (PM) fibers.
![Optical grating for the diffraction of light Optical grating for the diffraction of light](/fileadmin/_processed_/8/0/csm_grating-machine_5804b36872.png)
![Optical grating for the diffraction of light Optical grating for the diffraction of light](/fileadmin/_processed_/8/0/csm_grating-machine_8b4b3ebb73.png)
Polyimide-coated PM fibers can withstand temperatures of up to 300°C for long periods of time.
![Telecommunication PM Fiber Telecommunication PM Fiber](/fileadmin/_processed_/b/5/csm_telecommunication-pm-fiber-26-37_a869e5e3d8.png)
![Telecommunication PM Fiber Telecommunication PM Fiber](/fileadmin/_processed_/b/5/csm_telecommunication-pm-fiber-26-37_3c79b6584c.png)
The modes of PM telecom fibers correspond to those of standard telecom fibers.
![PM Fiber PM Fiber](/fileadmin/_processed_/1/2/csm_pm-fiber-26-37_98f40f7cb0.png)
![PM Fiber PM Fiber](/fileadmin/_processed_/1/2/csm_pm-fiber-26-37_4d9f4ecd4b.png)
Fiber optic gyroscopes with SAPs in a bow-tie arrangement offer high birefringence and a constant extinction ratio of polarization.
![Pure Silica Core PM Fiber Pure Silica Core PM Fiber](/fileadmin/_processed_/f/9/csm_pure-silica-core-pm-fiber-26-37_8e23916c51.png)
![Pure Silica Core PM Fiber Pure Silica Core PM Fiber](/fileadmin/_processed_/f/9/csm_pure-silica-core-pm-fiber-26-37_903acd8588.png)
Unlike standard germanium-doped fibers, polarization-maintaining fibers with a quartz glass core do not exhibit a photodarkening effect in short-wave light.
![PM Fiber PM Fiber](/fileadmin/_processed_/1/2/csm_pm-fiber-26-37_98f40f7cb0.png)
![PM Fiber PM Fiber](/fileadmin/_processed_/1/2/csm_pm-fiber-26-37_4d9f4ecd4b.png)
The fiber-based Zing polarizers allow only one polarization state to pass. This is due to the extreme birefringence caused by the bow tie geometry of the core.