Features
Minimize Feedback into Optical System
Free-Space Input and Output
Fixed Wavelength
Polarization Dependent
Smallest and Least Expensive
No Tuning
Thorlabs IO-2.5-1550-VLP Free-Space Isolator is a fixed narrowband isolator with optics that are factory aligned and fixed into place so that the peak isolation and transmission will occur at 1550 nm, the pre-defined center wavelength. Any deviation from this wavelength will cause a dip in isolation and transmission. This isolator has a Very Low Power (VLP) absorptive film polarizer which is the smallest package we offer.
Optical isolators are magneto-optic devices that only transmit light in one direction. They are able to isolate a source, such as a laser, from back reflections. Back reflections typically create instabilities in a system, which can lead to a number of issues. Mode hop, amplitude modulation, and frequency shifts are all possible side effects of these instabilities. Additionally, power spikes created by back reflections can permanently damage equipment such as lasers and optics.
Thorlabs offers a wide selection of in-stock free-space optical isolators. These isolators typically have higher transmittance and isolation than all other isolators on the market. Furthermore, because of certain proprietary features (covered by 25 years of experience and 5 US patents), our isolators are smaller and have higher performance than any other units of equivalent aperture available.
