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1. 发明申请

US20090052488A1 QUANTUM CASCADE LASER ELEMENT 有权
标题翻译：量子CASCADE激光元件
公开(公告)号：US20090052488A1
公开(公告)日：2009-02-26
申请号：US12194946
申请日：2008-08-20
申请人： Atsushi SUGIYAMA , Takahide Ochiai , Kazuue Fujita , Naota Akikusa , Tadataka Edamura , Shinichi Furuta
发明人： Atsushi SUGIYAMA , Takahide Ochiai , Kazuue Fujita , Naota Akikusa , Tadataka Edamura , Shinichi Furuta
IPC分类号： H01S3/08 , H01S5/00
CPC分类号： H01S5/12 , B82Y20/00 , H01S3/08031 , H01S5/0655 , H01S5/2272 , H01S5/3412 , H01S5/34366
摘要： A DFB quantum cascade laser element that can reliably CW-oscillate a single-mode light even at room temperature or a temperature in proximity thereof is provided. In a quantum cascade laser element 1, a top-grating approach for which a diffraction grating 7 is formed on a laminate 3 is adopted, and thus in comparison with a buried-grating approach, deterioration in temperature characteristics of the laser element and decline in the yield and reproducibility are suppressed. In addition, since the thickness of a cladding layer 5 located between an active layer 4 and the diffraction grating 7 is within a range of 42±10% of the oscillation wavelength, weakening of light seeping from the active layer 4 to the diffraction grating 7 or an increase in light leakage is prevented. Consequently, by the quantum cascade laser element 1, a single-mode light can be reliably CW-oscillated even at room temperature or a temperature in proximity thereof.
摘要翻译：提供即使在室温或其附近的温度也可以可靠地CW振荡单模光的DFB量子级联激光元件。在量子级联激光元件1中，采用了在层压板3上形成衍射光栅7的顶部光栅方法，因此与掩埋光栅方法相比，激光元件的温度特性的劣化和下降产量和再现性被抑制。此外，由于位于有源层4和衍射光栅7之间的包覆层5的厚度在振荡波长的42±10％的范围内，因此从有源层4向衍射光栅7渗透的光的弱化或者防止光泄漏的增加。因此，通过量子级联激光元件1，即使在室温或其附近的温度下，也可以将单模光可靠地CW振荡。

2. 发明授权

US08098701B2 Quantum cascade laser element 有权
标题翻译：量子级联激光元件
公开(公告)号：US08098701B2
公开(公告)日：2012-01-17
申请号：US12194946
申请日：2008-08-20
申请人： Atsushi Sugiyama , Takahide Ochiai , Kazuue Fujita , Naota Akikusa , Tadataka Edamura , Shinichi Furuta
发明人： Atsushi Sugiyama , Takahide Ochiai , Kazuue Fujita , Naota Akikusa , Tadataka Edamura , Shinichi Furuta
IPC分类号： H01S5/00 , H01S3/08
CPC分类号： H01S5/12 , B82Y20/00 , H01S3/08031 , H01S5/0655 , H01S5/2272 , H01S5/3412 , H01S5/34366
摘要： A DFB quantum cascade laser element that can reliably CW-oscillate a single-mode light even at room temperature or a temperature in proximity thereof is provided. In a quantum cascade laser element 1, a top-grating approach for which a diffraction grating 7 is formed on a laminate 3 is adopted, and thus in comparison with a buried-grating approach, deterioration in temperature characteristics of the laser element and decline in the yield and reproducibility are suppressed. In addition, since the thickness of a cladding layer 5 located between an active layer 4 and the diffraction grating 7 is within a range of 42±10% of the oscillation wavelength, weakening of light seeping from the active layer 4 to the diffraction grating 7 or an increase in light leakage is prevented. Consequently, by the quantum cascade laser element 1, a single-mode light can be reliably CW-oscillated even at room temperature or a temperature in proximity thereof.
摘要翻译：提供即使在室温或其附近的温度也可以可靠地CW振荡单模光的DFB量子级联激光元件。在量子级联激光元件1中，采用了在层压板3上形成衍射光栅7的顶部光栅方法，因此与掩埋光栅方法相比，激光元件的温度特性的劣化和下降产量和再现性被抑制。此外，由于位于有源层4和衍射光栅7之间的包覆层5的厚度在振荡波长的42±10％的范围内，因此从有源层4向衍射光栅7渗透的光的弱化或者防止光泄漏的增加。因此，通过量子级联激光元件1，即使在室温或其附近的温度下，也可以将单模光可靠地CW振荡。

3. 发明授权

US08068528B2 Quantum cascade laser 有权
标题翻译：量子级联激光器
公开(公告)号：US08068528B2
公开(公告)日：2011-11-29
申请号：US12523277
申请日：2007-06-06
申请人： Tadataka Edamura , Naota Akikusa , Kazuue Fujita , Atsushi Sugiyama , Takahide Ochiai
发明人： Tadataka Edamura , Naota Akikusa , Kazuue Fujita , Atsushi Sugiyama , Takahide Ochiai
IPC分类号： H01S5/00
CPC分类号： H01S5/3402 , B82Y20/00 , H01S5/3086 , H01S5/309 , H01S5/34313
摘要： A quantum cascade laser includes a semiconductor substrate, and an active layer which is provided on the semiconductor substrate, and has a cascade structure in which unit laminate structures 16 having quantum well emission layers 17 and injection layers 18 are laminated in multiple stages. Further, the quantum cascade laser is configured such that the unit laminate structure 16 has an emission upper level Lup, an emission lower level Llow, and a relaxation miniband MB including an energy level lower than the emission lower level in its subband level structure, and light is generated by an intersubband transition of electrons from the upper level to the lower level, and the electrons after the intersubband transition are relaxed from the lower level Llow to the miniband MB through LO phonon scattering, to be injected from the injection layer 18 to the latter stage emission layer via the miniband MB. Thereby, the quantum cascade laser which is capable of efficiently forming an inverted population in the quantum well emission layer, to improve its laser operation performance, is realized.
摘要翻译：量子级联激光器包括半导体衬底和设置在半导体衬底上的有源层，并且具有级联结构，其中具有量子阱发射层17和注入层18的单元叠层结构16多层叠。此外，量子级联激光器被配置为使得单元层压结构16具有包括其子带级结构中的低于发射较低电平的能级的发射上电平Lup，发射低电平Llow和弛豫微型MB，以及光通过从上层到下层的电子的子带间跃迁产生，并且子带间过渡之后的电子通过LO声子散射从低层Llow松弛到微型MB，从注入层18注入到后级发射层通过miniband MB。由此，可以实现能够在量子阱发射层中有效地形成反向群体的量子级联激光器，以提高其激光器的操作性能。

4. 发明申请

US20100111127A1 QUANTUM CASCADE LASER 有权
标题翻译：量子CASCADE激光
公开(公告)号：US20100111127A1
公开(公告)日：2010-05-06
申请号：US12523277
申请日：2007-06-06
申请人： Tadataka Edamura , Naota Akikusa , Kazuue Fujita , Atsushi Sugiyama , Takahide Ochiai
发明人： Tadataka Edamura , Naota Akikusa , Kazuue Fujita , Atsushi Sugiyama , Takahide Ochiai
IPC分类号： H01S5/343
CPC分类号： H01S5/3402 , B82Y20/00 , H01S5/3086 , H01S5/309 , H01S5/34313
摘要： A quantum cascade laser includes a semiconductor substrate, and an active layer which is provided on the semiconductor substrate, and has a cascade structure in which unit laminate structures 16 having quantum well emission layers 17 and injection layers 18 are laminated in multiple stages. Further, the quantum cascade laser is configured such that the unit laminate structure 16 has an emission upper level Lup, an emission lower level Llow, and a relaxation miniband MB including an energy level lower than the emission lower level in its subband level structure, and light is generated by an intersubband transition of electrons from the upper level to the lower level, and the electrons after the intersubband transition are relaxed from the lower level Llow to the miniband MB through LO phonon scattering, to be injected from the injection layer 18 to the latter stage emission layer via the miniband MB. Thereby, the quantum cascade laser which is capable of efficiently forming an inverted population in the quantum well emission layer, to improve its laser operation performance, is realized.
摘要翻译：量子级联激光器包括半导体衬底和设置在半导体衬底上的有源层，并且具有级联结构，其中具有量子阱发射层17和注入层18的单元叠层结构16多层叠。此外，量子级联激光器被配置为使得单元层压结构16具有包括其子带级结构中的低于发射较低电平的能级的发射上电平Lup，发射低电平Llow和弛豫微型MB，以及光通过从上层到下层的电子的子带间跃迁产生，并且子带间过渡之后的电子通过LO声子散射从低层Llow松弛到微型MB，从注入层18注入到后级发射层通过miniband MB。由此，可以实现能够在量子阱发射层中有效地形成反向群体的量子级联激光器，以提高其激光器的操作性能。

5. 发明授权

US08675702B2 Laser module 有权
标题翻译：激光模块
公开(公告)号：US08675702B2
公开(公告)日：2014-03-18
申请号：US13256657
申请日：2010-05-21
申请人： Takahide Ochiai , Naota Akikusa , Tadataka Edamura , Hirofumi Kan
发明人： Takahide Ochiai , Naota Akikusa , Tadataka Edamura , Hirofumi Kan
IPC分类号： H01S5/34
CPC分类号： H01S5/3402 , B82Y20/00 , H01S3/094057 , H01S5/005 , H01S5/02248 , H01S5/02415 , H01S5/0683
摘要： A laser module LM is provided with a quantum cascade laser 1, a tubular member 5, and an infrared detector 7. The tubular member 5 has a pair of opening ends 5a, 5b and is arranged so that one opening end 5a is opposed to a face 1b opposed to an emitting end face 1a of the quantum cascade laser 1. The infrared detector 7 is arranged so as to be opposed to the other opening end 5b of the tubular member 5. Light emitted from the face (rear end face) 1b opposed to the emitting end face (front end face) 1a of the quantum cascade laser 1 is guided inside the tubular member 5 to enter the infrared detector 7, and then is detected.
摘要翻译：激光模块LM设置有量子级联激光器1，管状部件5和红外线检测器7.管状部件5具有一对开口端部5a，5b，并且布置成使得一个开口端部5a与面1b与量子级联激光器1的发射端面1a相对。红外线检测器7被布置成与管状部件5的另一个开口端5b相对。从面（后端面）1b发射的光与量子级联激光器1的发射端面（前端面）1a相对的方向被引导到管状部件5内，进入红外线检测器7，然后被检测。

6. 发明申请

US20120014402A1 LASER MODULE 有权
标题翻译：激光模块
公开(公告)号：US20120014402A1
公开(公告)日：2012-01-19
申请号：US13256657
申请日：2010-05-21
申请人： Takahide Ochiai , Naota Akikusa , Tadataka Edamura , Hirofumi Kan
发明人： Takahide Ochiai , Naota Akikusa , Tadataka Edamura , Hirofumi Kan
IPC分类号： H01S3/14
CPC分类号： H01S5/3402 , B82Y20/00 , H01S3/094057 , H01S5/005 , H01S5/02248 , H01S5/02415 , H01S5/0683
摘要： A laser module LM is provided with a quantum cascade laser 1, a tubular member 5, and an infrared detector 7. The tubular member 5 has a pair of opening ends 5a, 5b and is arranged so that one opening end 5a is opposed to a face 1b opposed to an emitting end face 1a of the quantum cascade laser 1. The infrared detector 7 is arranged so as to be opposed to the other opening end 5b of the tubular member 5. Light emitted from the face (rear end face) 1b opposed to the emitting end face (front end face) 1a of the quantum cascade laser 1 is guided inside the tubular member 5 to enter the infrared detector 7, and then is detected.
摘要翻译：激光模块LM设置有量子级联激光器1，管状部件5和红外线检测器7.管状部件5具有一对开口端部5a，5b，并且布置成使得一个开口端部5a与面1b与量子级联激光器1的发射端面1a相对。红外线检测器7被布置成与管状部件5的另一个开口端5b相对。从面（后端面）1b发射的光与量子级联激光器1的发射端面（前端面）1a相对的方向被引导到管状部件5内，进入红外线检测器7，然后被检测。

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