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    • 6. 发明授权
    • Semiconductor laser
    • 半导体激光器
    • US4726031A
    • 1988-02-16
    • US784594
    • 1985-10-04
    • Kiyohide WakaoHaruhisa Soda
    • Kiyohide WakaoHaruhisa Soda
    • H01S5/00H01S5/042H01S5/06H01S5/10H01S5/12H01S3/19
    • H01S5/10H01S5/12H01S5/1057H01S5/106H01S5/1064H01S5/1243
    • A semiconductor laser including a stripe-shaped active layer, a clad region, and a diffraction grating. The stripe-shaped active layer has a thickness in a first direction, has a first energy gap, and extends in a second direction orthogonal to the first direction. The clad region surrounds the stripe-shaped active layer, and has a second energy band gap greater than the first energy band gap. The diffraction grating is provided in parallel with and adjacent to, the stripe-shaped active layer. The stripe-shaped active layer has a first portion with a first light propagation constant and with a first dimension in a third direction orthogonal to the first and second directions, and has a second portion with a second light propagation constant and with a second dimension in the third direction. The first dimension and the second dimension are different from each other. The second portion has a length L in the second direction. The stripe-shaped active layer satisfies the condition that a product of .DELTA..beta. and L is an odd multiple of .pi./2, where .DELTA..beta. is a difference between the first and second light propagation constants.
    • 一种包括条形有源层,包层区和衍射光栅的半导体激光器。 条形有源层具有第一方向的厚度,具有第一能隙,并且沿与第一方向正交的第二方向延伸。 包层区域围绕条状有源层,并且具有大于第一能带隙的第二能带隙。 衍射光栅与条形有源层平行并相邻地设置。 条形有源层具有第一部分,具有第一光传播常数,第一尺寸在与第一和第二方向正交的第三方向上,并且具有第二部分,具有第二光传播常数,第二部分具有第二尺寸 第三个方向。 第一维度和第二维度彼此不同。 第二部分在第二方向上具有长度L. 条形有源层满足以下条件:DELTAβ和L的乘积是pi / 2的奇数倍,其中ΔTAβ是第一和第二光传播常数之间的差。
    • 9. 发明授权
    • Variable wavelength light source
    • 可变波长光源
    • US07711019B2
    • 2010-05-04
    • US12028311
    • 2008-02-08
    • Haruhisa Soda
    • Haruhisa Soda
    • H01S3/13
    • H01S5/141H01S3/105H01S5/02248H01S5/02284H01S5/0617H01S5/0687H01S5/142
    • A gain element and a variable wavelength reflector form a resonator. A wavelength selective element selects a resonance wavelength in the resonator. A beam splitter is provided for monitoring an incident light from the gain element and a reflected light from the variable wavelength reflector. A phase adjustment element is arranged in the resonator. A wavelength-lock control unit locks the resonance wavelength to a desired resonance wavelength by adjusting the phase of the resonance wavelength based on the monitored incident light and by adjusting the variable wavelength reflector based on a ratio between the incident light and the reflected light.
    • 增益元件和可变波长反射器形成谐振器。 波长选择元件选择谐振器中的谐振波长。 提供一种分束器,用于监测来自增益元件的入射光和来自可变波长反射器的反射光。 谐振器中布置有相位调整元件。 波长锁定控制单元通过基于所监视的入射光调节谐振波长的相位并且基于入射光和反射光之间的比率来调节可变波长反射器,将谐振波长锁定到期望的谐振波长。
    • 10. 发明申请
    • VARIABLE WAVELENGTH LIGHT SOURCE
    • 可变波长光源
    • US20080212622A1
    • 2008-09-04
    • US12028311
    • 2008-02-08
    • Haruhisa Soda
    • Haruhisa Soda
    • H01S3/098
    • H01S5/141H01S3/105H01S5/02248H01S5/02284H01S5/0617H01S5/0687H01S5/142
    • A gain element and a variable wavelength reflector form a resonator. A wavelength selective element selects a resonance wavelength in the resonator. A beam splitter is provided for monitoring an incident light from the gain element and a reflected light from the variable wavelength reflector. A phase adjustment element is arranged in the resonator. A wavelength-lock control unit locks the resonance wavelength to a desired resonance wavelength by adjusting the phase of the resonance wavelength based on the monitored incident light and by adjusting the variable wavelength reflector based on a ratio between the incident light and the reflected light.
    • 增益元件和可变波长反射器形成谐振器。 波长选择元件选择谐振器中的谐振波长。 提供一种分束器,用于监测来自增益元件的入射光和来自可变波长反射器的反射光。 谐振器中布置有相位调整元件。 波长锁定控制单元通过基于所监视的入射光调节谐振波长的相位并且基于入射光和反射光之间的比率来调节可变波长反射器,将谐振波长锁定到期望的谐振波长。