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    • 2. 发明授权
    • Quantum cascade laser
    • 量子级联激光器
    • US09276381B2
    • 2016-03-01
    • US14520500
    • 2014-10-22
    • HAMAMATSU PHOTONICS K.K.
    • Atsushi SugiyamaTadataka EdamuraNaota Akikusa
    • H01S5/34H01S5/028H01S5/02H01S5/22
    • H01S5/3401H01S5/0207H01S5/028H01S5/0281H01S5/0285H01S5/0286H01S5/0287H01S5/22H01S5/34
    • A quantum cascade laser includes a semiconductor substrate, and an active layer being provided on the substrate, and having a cascade structure in which quantum well emission layers and injection layers are alternately laminated, and the laser has a base portion including the substrate, and a stripe-shaped ridge portion including the active layer. Further, a reflection control film is formed from a ridge end face over a base end face on an end face in a resonating direction of the laser, and, on the base end face, for a second side and a third side adjacent to a first side on the ridge portion side of the base end face, and a fourth side facing the first side, the reflection control film is formed on a region other than regions near those three sides with predetermined widths.
    • 量子级联激光器包括半导体衬底,并且有源层设置在衬底上,并且具有量子阱发射层和注入层交替层叠的级联结构,并且激光器具有包括衬底的基部,以及 包括活性层的条纹状脊部。 此外,在激光的共振方向的端面上的基端面上的脊端面形成反射控制膜,并且在基端面上,与第一侧面相邻的第二侧面和第三侧面 在基端面的脊部侧的侧面以及面向第一侧的第四面,反射控制膜形成在除了三边以外的区域以外的区域上,具有预定的宽度。
    • 3. 发明申请
    • QUANTUM CASCADE LASER
    • 量子CASCADE激光
    • US20150117484A1
    • 2015-04-30
    • US14520500
    • 2014-10-22
    • HAMAMATSU PHOTONICS K.K.
    • Atsushi SUGIYAMATadataka EDAMURANaota AKIKUSA
    • H01S5/34
    • H01S5/3401H01S5/0207H01S5/028H01S5/0281H01S5/0285H01S5/0286H01S5/0287H01S5/22H01S5/34
    • A quantum cascade laser includes a semiconductor substrate, and an active layer being provided on the substrate, and having a cascade structure in which quantum well emission layers and injection layers are alternately laminated, and the laser has a base portion including the substrate, and a stripe-shaped ridge portion including the active layer. Further, a reflection control film is formed from a ridge end face over a base end face on an end face in a resonating direction of the laser, and, on the base end face, for a second side and a third side adjacent to a first side on the ridge portion side of the base end face, and a fourth side facing the first side, the reflection control film is formed on a region other than regions near those three sides with predetermined widths.
    • 量子级联激光器包括半导体衬底,并且有源层设置在衬底上,并且具有量子阱发射层和注入层交替层叠的级联结构,并且激光器具有包括衬底的基部,以及 包括活性层的条纹状脊部。 此外,在激光的共振方向的端面上的基端面上的脊端面形成反射控制膜,并且在基端面上,与第一侧面相邻的第二侧面和第三侧面 在基端面的脊部侧的侧面以及面向第一侧的第四面,反射控制膜形成在除了三边以外的区域以外的区域上,具有预定的宽度。
    • 9. 发明授权
    • Lasing semiconductor optical amplifier with output power monitor and control
    • 具有输出功率监控和控制的激光半导体光放大器
    • US06801555B1
    • 2004-10-05
    • US10092455
    • 2002-03-06
    • Sol P. DiJailiJeffrey D. Walker
    • Sol P. DiJailiJeffrey D. Walker
    • H01S300
    • H01S5/18311H01S5/0285H01S5/0622H01S5/0683H01S5/1032H01S5/2009H01S5/5072
    • An optical signal power monitoring and control system is described. The system comprises at least one lasing SOA that receives, amplifies, and outputs the optical signal. During the signal amplification, a ballast laser signal is output through a substrate of the lasing SOA. This ballast laser signal is indicative of the output power of the lasing SOA. At least one detector converts the ballast laser signal to an electrical signal and transmits this electrical signal to a power monitor circuit. Using the electrical signal, the power monitor determines the output power of the lasing SOA. A pump control adjusts the rate at which the lasing SOA is pumped in order to change the saturation level of the lasing SOA and its corresponding power output ceiling. According to one embodiment, the power monitor identifies when the lasing SOA is approaching saturation or is saturated. If the lasing SOA is saturated or approaching saturation, the pump control increases its pumping rate causing the saturation level of the lasing SOA to rise. As a result, the lasing SOA is provided protection from saturation.
    • 描述了光信号功率监控系统。 该系统包括接收,放大和输出光信号的至少一个激光器SOA。 在信号放大期间,镇流器激光信号通过激光器SOA的衬底输出。 该镇流器激光信号表示激光器的输出功率。 至少一个检测器将镇流器激光信号转换为电信号,并将该电信号传输到功率监视器电路。 使用电信号,功率监视器确定激光器的输出功率。 泵控制器调整激光器的泵浦泵送速率,以便改变激光器的饱和度和相应的功率输出上限。 根据一个实施例,功率监视器识别激光器SOA何时接近饱和或饱和。 如果激光器的SOA饱和或接近饱和,泵控制会增加其泵浦速率,导致激光器SOA的饱和水平上升。 因此,提供了保护免受饱和影响的激光SOA。