公开(公告)号：US06748173B2

公开(公告)日：2004-06-08

申请号：US09757254

申请日：2001-01-09

Applicant: Yoshikazu Ishii ,  Susumu Kirii ,  Hideto Takahashi ,  Kuniharu Itakura ,  Shinshi Kuno

Inventor： Yoshikazu Ishii ,  Susumu Kirii ,  Hideto Takahashi ,  Kuniharu Itakura ,  Shinshi Kuno

IPC: H04J1402

CPC classification number: H04B10/697

Abstract: Optical transmission being performed by frequency modulating frequency-division-multiplexed multi-channel signals as a single unit, distortion that is caused by a ripple-shaped group delay deviation in a transmitter 2, a receiver 4 and an optical link 3 is reduced by providing a level adjuster 2a for adjusting the level of frequency-division-multiplexed multi-channel signals input to the FM modulator 2b, and by increasing the input level of multi-channel signals to the FM modulator 2b by level adjusting means 2a to enlarge the bandwidth of FM signal, in the case where the number of channels is small.

Abstract translation: 通过频率调制分频多路复用多通道信号作为单个单元执行光传输，通过提供发射机2，接收机4和光链路3中的波纹状组延迟偏差引起的失真减少 电平调节器2a，用于调节输入到FM调制器2b的分频多路复用多通道信号的电平，以及通过电平调整装置2a将调制器2b的多声道信号的输入电平增大到放大带宽 的FM信号，在通道数量少的情况下。

公开(公告)号：US20080106780A1

公开(公告)日：2008-05-08

申请号：US11935744

申请日：2007-11-06

Applicant: Tsutomu Niiho ,  Kouichi Masuda ,  Masaru Fuse ,  Fumio Fujisaki ,  Kuniharu Itakura ,  Tomoaki Ohira

Inventor： Tsutomu Niiho ,  Kouichi Masuda ,  Masaru Fuse ,  Fumio Fujisaki ,  Kuniharu Itakura ,  Tomoaki Ohira

IPC: G02F1/03

CPC classification number: G02F1/225 ,  G02F1/0123 ,  G02F2001/212

Abstract: An optical modulator comprises an electrode 21 which applies to an optical waveguides 12 of a Mach-Zehnder type optical interference system a first electric signal based on an alternating current signal S1 and a direct current bias V1, an electrode 22 which applies to an optical waveguide 13 of the Mach-Zehnder type optical interference system a second electric signal based on an alternating current signal S2 and a direct current bias V2, and a bias setting section 41 which sets average direct current levels of the first and second electric signals based on signal frequency information D1 which indicates a magnitude relation between a maximum frequency of the alternating current signal S1 and a maximum frequency of the alternating current signal S2.

Abstract translation: 光调制器包括电极21，电极21基于交流电信号S1和直流偏压V 1施加马赫 - 策德尔型光学干涉系统的光波导12，第一电信号适用于 马赫曾德尔型光学干涉系统的光波导13基于交流信号S 2和直流偏压V 2的第二电信号，以及偏置设定部41，其设定第一和第二电气的平均直流电平 基于表示交流信号S 1的最大频率与交流信号S2的最大频率之间的大小关系的信号频率信息D 1的信号。

公开(公告)号：US07660027B2

公开(公告)日：2010-02-09

申请号：US11935744

申请日：2007-11-06

Applicant: Tsutomu Niiho ,  Kouichi Masuda ,  Masaru Fuse ,  Fumio Fujisaki ,  Kuniharu Itakura ,  Tomoaki Ohira

Inventor： Tsutomu Niiho ,  Kouichi Masuda ,  Masaru Fuse ,  Fumio Fujisaki ,  Kuniharu Itakura ,  Tomoaki Ohira

IPC: G02B1/07

CPC classification number: G02F1/225 ,  G02F1/0123 ,  G02F2001/212

Abstract: An optical modulator comprises an electrode 21 which applies to an optical waveguides 12 of a Mach-Zehnder type optical interference system a first electric signal based on an alternating current signal S1 and a direct current bias V1, an electrode 22 which applies to an optical waveguide 13 of the Mach-Zehnder type optical interference system a second electric signal based on an alternating current signal S2 and a direct current bias V2, and a bias setting section 41 which sets average direct current levels of the first and second electric signals based on signal frequency information D1 which indicates a magnitude relation between a maximum frequency of the alternating current signal S1 and a maximum frequency of the alternating current signal S2.

Abstract translation: 光调制器包括电极21，该电极施加到马赫 - 曾德尔型光学干涉系统的光波导12，基于交流信号S1和直流偏压V1的第一电信号，适用于光波导的电极22 马赫曾德尔型光干涉系统13基于交流信号S2和直流偏压V2的第二电信号，以及偏置设定部41，其基于信号设定第一和第二电信号的平均直流电平 表示交流信号S1的最大频率与交流信号S2的最大频率之间的大小关系的频率信息D1。