What is the primary use for the Shelyak 200µm calibration fiber?
This fiber is designed to conduct light from a calibration module (like a Thorium-Argon or Tungsten lamp) to the Fiber Injection & Guiding Unit (FIGU) of a spectroscope. It is specifically optimized for Shelyak's own eShel and Whoppshel Echelle spectroscopy systems.
If I place my eShel calibration unit 15 meters away, will a longer fiber have more signal loss than this 10m fiber?
No, you should not see any practical difference in signal strength. The manufacturer specifies that attenuation is less than 0.5dB regardless of length (up to 20m). This is because the minimal signal loss occurs at the FC-FC connector junctions, not along the highly transmissive fiber itself.
Why is the core diameter of this Shelyak fiber 200µm?
The 200µm core diameter is matched to the optical design of spectrographs like the eShel. This ensures the maximum amount of light from the calibration lamp is efficiently captured and injected into the spectrograph for accurate wavelength calibration.
I have a Whoppshel spectrograph. Is this 10m calibration fiber the correct one to use?
Yes. This 200µm calibration fiber is explicitly designed and optimized for use with both the Shelyak eShel and Whoppshel spectroscopy systems, ensuring full compatibility and reliable operation.
What are FC-FC connectors on this 200µm fiber?
FC connectors are a standard for high-quality optical fibers. They provide a secure, threaded connection that ensures precise alignment of the fiber cores, which minimizes signal loss and prevents accidental disconnection during an observing session.
What does the stainless steel protection on the Shelyak calibration fiber do?
The stainless steel sheath acts as a durable armor for the delicate glass fiber inside. It protects the fiber from being crushed by equipment, kinked from tight bends, or otherwise damaged, ensuring the long-term reliability and signal integrity of your calibration setup.
