New Focus, a Newport Corp. brand, introduces the GHz Nirvana, a high-speed photoreceiver with automatic signal balancing. It offers high bandwidth and fiber coupling. The autobalance feature eliminates background noise from dynamically changing systems, including thermal drift and wavelength dependence, yielding perfect power balance between the reference and signal beams. It eliminates the need to optically balance the detectors and enables measurement systems that can accommodate drift over time. The user can balance in optical and manual modes. The receiver improves the performance of swept-source OCT using high-speed balanced and autobalanced detection. In this application, the balanced detection allows subtraction of all common-mode noise and improves the ability to resolve low-scattering features deep in the sample.