发明名称 |
Distributed feedback semiconductor laser with phase shift region having polarization dependency, optical transmitter, and optical communication system using the same |
摘要 |
A distributed feedback semiconductor laser of the present invention includes a waveguide with an active layer and a diffraction grating, and a first phase shift region formed in the waveguide. The waveguide extends along a cavity-axial direction and is defined such that propagation of light in two different polarization modes is permitted in the waveguide. The first phase shift region extends along the cavity-axial direction and has a polarization dependency that an effective refractive index for propagation light of the first phase shift region differs from an effective refractive index for propagation light of a region of the waveguide other than the first phase shift region such that a phase shift of a quarter wavelength of the propagation light is created for one of the two polarization modes and a phase shift of a half wavelength of the propagation light is created for the other of the two polarization modes in the first phase shift region.
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申请公布号 |
US6411640(B1) |
申请公布日期 |
2002.06.25 |
申请号 |
US19990292018 |
申请日期 |
1999.04.15 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
NAKANISHI KOICHIRO |
分类号 |
H04B10/04;H01S5/00;H01S5/042;H01S5/0625;H01S5/10;H01S5/12;H04B10/06;H04B10/142;H04B10/152;H04B10/155;(IPC1-7):H01S5/12 |
主分类号 |
H04B10/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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