Patents by Inventor Yasubiro Aoki

Yasubiro Aoki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optical transmitter
    Patent number: 5315426
    Abstract: An optical transmitter includes a semiconductor laser which is supplied with a frequency modulated current. An emitted light from the semiconductor laser is modulated in intensity by an intensity modulator in accordance with an information signal and becomes a signal light pulse. The spectral width .DELTA..nu..sub.m of the light and a power P.sub.s of the signal light pulse meet the following formulas: ##EQU1## where P.sub.th is a threshold input light power when the stimulated Brillouin scattering begins to occur in the optical fiber in case of no frequency modulation of said light, .DELTA..nu..sub.B is the Brillouin gain bandwidth of the optical fiber, and .DELTA..nu..sub.s is the spectral width of the signal light in case of no frequency modulation of the light.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: May 24, 1994
    Assignee: NEC Corporation
    Inventor: Yasubiro Aoki