Slow and stopped light systems form an important piece of the photonics puzzle by acting as memory devices. When used with few-photon light levels, these devices are fundamental to applications in quantum information science, quantum computing, and quantum communication. I will present a technique for measuring the quantum state of light that does not require careful mode matching. By using this technique to measure the quantum state of stored-and-retrieved light we can optimize the measured field mode without prior knowledge of the stored light modes.