Optical output system, measurement system, optical pump-probe scanning tunneling microscope system, computing device, program, and computing method

An arithmetic unit used together with a first laser for outputting first light which is a pulse laser, in response to input of a first signal, and a second laser for outputting second light which is a pulse laser, in response to input of a second signal, wherein

• the arithmetic unit is configured
• to input the first signal and the second signal to the first laser and the second laser;
• to decide a variable delay value, which is a difference between a timing to input the first signal to the first laser and a timing to input the second signal to the second laser, and
• repeatedly to input the first signal and the second signal with switching the variable delay in a plurality of ways;
• and
• the arithmetic unit comprises a signal output unit that outputs a reference signal indicating a timing when the variable delay value is changed.

An arithmetic operation method executed by an arithmetic unit that is configured to generate first and second signals, the arithmetic unit being used together with a first laser for outputting first light which is a pulse laser in response to input of the first signal, and a second laser for outputting second light which is a pulse laser in response to input of the second signal,

• the arithmetic operation method comprising:
• inputting the first signal and the second signal to the first laser and the second laser;
• repeatedly inputting the first signal and the second signal with switching a variable delay value decided by the arithmetic unit, which is a difference between a timing to input the first signal to the first laser and a timing to input the second signal to the second laser, in a plurality of ways;
• and
• outputting a reference signal indicating a timing when the variable delay value is changed.