Novel emitter and receiver system for THz radiation consisting of a 2-T permanent magnet, a 1040-nm compact fiber laser, and a room-temperature-operating thermal receiver

Summary form only given. There has been a strong need for a compact, intense, easily adjusted THz-radiation emitter and a timing-adjustment-free receiver. Recently, we demonstrated a compact THz-radiation source consisting of a small permanent magnet and a fiber laser. Although this THz-radiation source is potentially suitable for many applications, it needs liquid helium to operate a bolometer or complicated timing adjustment. Previously, the THz-radiation power is not intense enough to utilize a thermal receiver for detection, since the excitation laser power is 30 mW at maximum. The thermal receiver is regarded as a very important key device for applications of THz radiation because it operates at room temperature without liquid helium and timing adjustment. The presentation reports on a thermal-receiver detectable THz-radiation system using a higher average power fiber laser. The thermal receiver is Deuterated Triglycine Sulfate (DTGS), which works at room temperature.