The Edmund Optics Ultrafast Autocorrelator by APE is used to characterize ultrafast laser pulses originating from Ti:sapphire and Yb:doped lasers. Featuring a built-in Two Photon Absorption (TPA) detector, this autocorrelator is ideal for measuring ultrafast femtosecond and picosecond laser pulses at wavelengths from 700 to 1100nm. The highly sensitive TPA detector allows for measurements of ultrafast laser pulses with high sensitivity by eliminating the need for angle tuning of the SHG nonlinear crystal. The Edmund Optics Ultrafast Autocorrelator by APE is designed with a compact form factor and can be mounted onto an adjustable optical mount for easy incorporation into any ultrafast optical setup. Each autocorrelator ships with a built-in TPA detector, a controller with USB-interface, ready to use data acquisition software, and TCP/IP-based software with a subset of SCPI standard based commands that allow for users to program automated measurement routines. The Edmund Optics Ultrafast Autocorrelator by APE is calibrated to a traceable standard in accordance with NIST (U.S. National Institute of Standards and Technology) measurement traceability specifications.