Fujitsu Corporation

Yousuke Yamazaki

Goji Nakagawa

Tsuyoshi Yamamoto

Haruhiko Tabuchi

Hiroyuki Nobuhara

A ferrule assembly includes a ferrule having a through-hole, a first end portion, a second end portion, and an intermediate portion between the first and second end portions, and an optical fiber inserted and fixed in the through-hole. The ferrule has at the intermediate portion a cutaway flat portion allowing the optical fiber inserted in the through-hole to be semi-exposed, and the optical fiber has its entire circumference held by the ferrule at least at the first and second end portions of the ferrule.

Ferrule assembly and receptacle type optical transmission module

A multiwavelength light source for emitting light having multiple wavelengths. The multiwavelength light source includes a carrier and a laser diode array mounted on the carrier. The laser diode array is formed by integrating a plurality of laser diodes having substantially the same oscillation wavelength. The multiwavelength light source further includes a first temperature control device connected to the first end portion of the carrier and a second temperature control device connected to the second end portion of the carrier. The temperature of the first temperature control device is controlled to a first temperature, and the temperature of the second temperature control device is controlled to a second temperature different from the first temperature. The first and second temperature control devices produce a given temperature gradient in the carrier over its entire width from the first end portion to the second end portion to thereby oscillate the plural laser diodes with a desired wavelength spacing.

Growing community of inventors

Kawasaki, Japan

Yousuke Yamazaki