Fiber optic bundle for NMR ESR measurements

Nuclear Magnetic Resonance (NMR) spectroscopy and Electron Spin Resonance (ESR) spectroscopy are an established methods to assess changes in certain molecules in chemistry and biology. Both NMR and ESR spectroscopes are based on placing a sample in high magnetic field generated by special big electromagnets. These measurements can now also be extended to photochemistry and photobiology - measuring the magnetic resonance or electron spin resonance on molecules modified in reaction to light. Regular fiber optic assembly utilizes metal ferules for connectors and for the distal tip. These metal parts cannot be used within the NMR ESR spectrometers. In order to address this problem Prizmatix developed alternative method of fiber optic assembly. Now special non-metal fiber optic probes can be assembled of multiple fibers arranged on various configurations. In-line fibers arrangement (see photo) can be used to illuminate thin tubes or pipettes in the NMR or ESR spectrometer.

The fibers can be standard low NA silica fibers with Polyamide buffer, Hard-clad silica fibers with high NA of 0.37 or 0.48 or the Polymer Optical Fibers (POF) with NA of 0.5. The fibers can deliver light from a single or multiple fiber-coupled High Power Black-LEDs or Ultra-High Power Black-LEDs at various wavelengths. Other options include the fiber-coupled FC2-3-5-LED or MWLLS Multiwavelength LED Lights Sources, ranging from 2 to 11 different LEDs.