The FMH-8715 Fiber Optic Measurement Head is an integrating sphere based measurement head compatible with the FPM-8220 Fiber Optic Power Meter. The FMH-8715 is designed to measure optical power from -70 dBm to +20 dBm over a wavelength range of 800-1650nm. Interchangeable fiber optic adapters allow the FMH-8715 Fiber Optic Measurement Head to be compatible with a wide range of connectors including FC, SC, LC, bare FC ferrule, and bare fiber. Careful attention to the design allows the FMH-8715 Fiber Optic Measurement Head to achieve a polarization dependent response of less than ±0.006 dB.