How can BaySpecs FBGA-IRS measure wavelength with absolute accuracy of ±5pm?
BaySpec’s FBGA-IRS design implements an internal wavelength reference source (IRS), as an absolute wavelength standard. It has a wavelength accuracy of +/-5 pm over -10 to + 70 °C, while maintaining this over the full life of the product. No regular calibration is needed as the IRS is used to ‘calibrate’ the FBGA in real time, using an algorithm to make very accurate measurements in the sub-pixel accuracy level. Customers can have steady wavelength accuracy over any time period, any temperature, and anywhere owing to the portable form factor and ruggedized design. The absolute accuracy of ± 5pm is comparable to that of a high end wavelength meter (cost typically >US$40K), which is not easy to couple lasers into it. Thus, BaySpec’s FBGA-IRS offers significant cost savings with easy of use. It is designed for use not only as a high accuracy wavelength meter in the laboratory, but many demanding field applications.
