Ricoh Company, Ltd.

Yuma Takida

Yasuhiro Higashi

Hiroaki Minamide

Toshiyuki Ikeoh

Yoshio Wada

Takumi Satoh

Kouji Nawata

A pulsed electromagnetic-wave generator includes an excitation light source, a laser resonator, a pulse generating unit, and a wavelength converting unit. Excitation light from the excitation light source enters the laser resonator. The pulse generating unit is configured to generate a pulsed light group including at least two or more pulses with different frequencies (&#x3c9;) and different oscillation timings (t) in one excitation process of the excitation light source, an oscillation frequency difference (&#x394;&#x3c9;) between the pulses in the pulsed light group being an integral multiple of a Free Spectral Range (FSR) of the laser resonator. The pulsed light group enters the wavelength converting unit. The wavelength converting unit is configured to generate a pulsed electromagnetic wave in which a wavelength of each pulse in the pulsed light group is converted.

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Saitama, Japan

Yuma Takida