1000 nm band 5 GHz Phase Modulator The NIR-MPX-LN-05 is a phase modulator especially designed for phase modulation in the 1000 nm wavelength band at frequencies up to 5 GHz. Like all Photline Technologies NIR (Near InfraRed) modulators, the MPX-LN-05 is manufactured using a proton exchange based waveguide process that confers it a 100 mW optical power handling and an unparalleled stability.