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1. 发明申请

US20080002745A1 Control method of distributed Bragg reflection semiconductor laser, and image projecting apparatus 失效
标题翻译：分布式布拉格反射半导体激光器的控制方法和图像投影装置
公开(公告)号：US20080002745A1
公开(公告)日：2008-01-03
申请号：US11896142
申请日：2007-08-30
申请人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
发明人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
IPC分类号： H01S5/06
CPC分类号： H04N9/3129 , H01S5/005 , H01S5/0092 , H01S5/06256 , H01S5/06804
摘要： A distributed Bragg reflection (DBR) semiconductor laser is controlled in an image projecting apparatus. The image projecting apparatus includes the DBR semiconductor laser which is provided with a phase region and a DBR region, a light wavelength converting device for converting fundamental-wave light emitted from the DBR semiconductor laser into second harmonic wave light, an optical deflector for scanning the second harmonic wave in a one-dimensional or two-dimensional manner, and a modulating portion for modulating the DBR semiconductor laser based on an image signal. In the control method, a coefficient calculating step and a wavelength adjusting step are performed within a non-drawing time during which a drawing signal, which corresponds to the image signal, is absent. In the coefficient calculating step, at least one coefficient in a relationship between a DBR current to be injected into the DBR region and a phase current to be injected into the phase region for continuously shifting the wavelength of the fundamental-wave light is calculated. In the wavelength adjusting step, the DBR current injected into the DBR region and the phase current injected into the phase region are changed based on the relationship such that the second harmonic wave light is adjusted.
摘要翻译：在图像投影装置中控制分布式布拉格反射（DBR）半导体激光器。图像投影装置包括具有相位区域和DBR区域的DBR半导体激光器，用于将从DBR半导体激光器发射的基波光转换为二次谐波光的光波长转换装置，用于扫描一维或二维二次谐波，以及用于基于图像信号调制DBR半导体激光器的调制部分。在控制方法中，系数计算步骤和波长调整步骤在不存在对应于图像信号的绘制信号的非绘制时间内执行。在系数计算步骤中，计算要注入到DBR区域的DBR电流和要注入到用于连续移位基波的波长的相位区域的相电流之间的关系中的至少一个系数。在波长调整步骤中，根据调整二次谐波光的关系，改变注入DBR区域的DBR电流和注入相位区域的相电流。

2. 发明授权

US07809032B2 Control method of distributed Bragg reflection semiconductor laser, and image projecting apparatus 有权
标题翻译：分布式布拉格反射半导体激光器的控制方法和图像投影装置
公开(公告)号：US07809032B2
公开(公告)日：2010-10-05
申请号：US12363708
申请日：2009-01-30
申请人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
发明人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
IPC分类号： H01S3/13 , H01S5/00
CPC分类号： H04N9/3129 , H01S5/005 , H01S5/0092 , H01S5/06256 , H01S5/06804
摘要： A DBR semiconductor laser is controlled in an image projecting apparatus, which includes the DBR laser having a phase and DBR region, a light wavelength converting device for converting fundamental-wave light emitted from the DBR laser into second harmonic wave light, an optical deflector for scanning the second harmonic wave in a one or two-dimensional manner, and a modulating portion for modulating the DBR laser. Coefficient calculating and wavelength adjusting steps are performed within a non-drawing time. The coefficient calculating step calculates at least one coefficient in a relationship between a DBR current to be injected into the DBR region and a phase current to be injected into the phase region for continuously shifting the wavelength of the fundamental-wave light. The wavelength adjusting step changes DBR current injected into the DBR region and phase current injected into the phase region based on the relationship.
摘要翻译： DBR半导体激光器被控制在包括具有相位和DBR区域的DBR激光器的图像投影装置中，用于将从DBR激光器发射的基波光转换成二次谐波光的光波长转换装置，用于以一维或二维方式扫描二次谐波，以及用于调制DBR激光的调制部分。系数计算和波长调整步骤在非绘制时间内执行。系数计算步骤计算要注入到DBR区域的DBR电流和要注入到相位区域中的相电流之间的关系中的至少一个系数，以连续移位基波光的波长。基于该关系，波长调整步骤改变注入DBR区域的DBR电流和注入相位区域的相电流。

3. 发明申请

US20090213886A1 CONTROL METHOD OF DISTRIBUTED BRAGG REFLECTION SEMICONDUCTOR LASER, AND IMAGE PROJECTING APPARATUS 有权
标题翻译：分布式布拉格反射半导体激光器和图像投影设备的控制方法
公开(公告)号：US20090213886A1
公开(公告)日：2009-08-27
申请号：US12363708
申请日：2009-01-30
申请人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
发明人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
IPC分类号： H01S3/10
CPC分类号： H04N9/3129 , H01S5/005 , H01S5/0092 , H01S5/06256 , H01S5/06804
摘要： A DBR semiconductor laser is controlled in an image projecting apparatus, which includes the DBR laser having a phase and DBR region, a light wavelength converting device for converting fundamental-wave light emitted from the DBR laser into second harmonic wave light, an optical deflector for scanning the second harmonic wave in a one or two-dimensional manner, and a modulating portion for modulating the DBR laser. Coefficient calculating and wavelength adjusting steps are performed within a non-drawing time. The coefficient calculating step calculates at least one coefficient in a relationship between a DBR current to be injected into the DBR region and a phase current to be injected into the phase region for continuously shifting the wavelength of the fundamental-wave light. The wavelength adjusting step changes DBR current injected into the DBR region and phase current injected into the phase region based on the relationship.
摘要翻译： DBR半导体激光器被控制在包括具有相位和DBR区域的DBR激光器的图像投影装置中，用于将从DBR激光器发射的基波光转换成二次谐波光的光波长转换装置，用于以一维或二维方式扫描二次谐波，以及用于调制DBR激光的调制部分。系数计算和波长调整步骤在非绘制时间内执行。系数计算步骤计算要注入到DBR区域的DBR电流和要注入到相位区域中的相电流之间的关系中的至少一个系数，以连续移位基波光的波长。基于该关系，波长调整步骤改变注入DBR区域的DBR电流和注入相位区域的相电流。

4. 发明申请

US20050254531A1 Light wavelength converting apparatus, control method of the same, and image projecting apparatus using the same 失效
标题翻译：光波长变换装置及其控制方法以及使用其的图像投影装置
公开(公告)号：US20050254531A1
公开(公告)日：2005-11-17
申请号：US11120950
申请日：2005-05-04
申请人： Yukio Furukawa , Hajime Sakata , Kazunari Fujii
发明人： Yukio Furukawa , Hajime Sakata , Kazunari Fujii
IPC分类号： G02B26/10 , G02F1/377 , H01S3/10 , H01S5/00 , H01S5/02 , H01S5/06 , H01S5/0625 , H01S5/0687 , H01S5/125
CPC分类号： H01S5/06256 , H01S5/005 , H01S5/0092 , H01S5/02248 , H01S5/0617 , H01S5/06804
摘要： A light wavelength converting apparatus includes a semiconductor laser having a gain region, a phase region, and a distributed Bragg reflection (DBR) region, a nonlinear optical device for receiving fundamental-wave light emitted from the semiconductor laser and outputting second harmonic wave light, a first optical detector for monitoring an output of the fundamental-wave light, a second optical detector for monitoring the second harmonic wave light, and a control portion for controlling at least a drive current for driving the semiconductor laser. The control portion includes a control parameter determiner, and a wavelength controller. The control parameter determiner changes a DBR current supplied to the DBR region and a phase current supplied to the phase region to obtain a changing point that corresponds to a discontinuous change in an electrical signal from the first optical detector, and determines a control parameter for controlling the DBR current and the phase current such that the relationship between the DBR current and the phase current is not located on the changing point. The wavelength controller controls the DBR current and the phase current pursuant to the control parameter such that an oscillation wavelength of the semiconductor laser can be continuously controlled.
摘要翻译：光波长转换装置包括具有增益区域，相位区域和分布布拉格反射区域的半导体激光器，用于接收从半导体激光器发射的基波光并输出二次谐波光的非线性光学装置，用于监视基波输出的第一光检测器，用于监测第二谐波光的第二光检测器，以及用于至少控制用于驱动半导体激光器的驱动电流的控制部分。控制部分包括控制参数确定器和波长控制器。控制参数确定器改变提供给DBR区域的DBR电流和提供给相位区域的相电流，以获得对应于来自第一光学检测器的电信号的不连续变化的变化点，并且确定用于控制的控制参数 DBR电流和相电流使得DBR电流和相电流之间的关系不位于变化点上。波长控制器根据控制参数控制DBR电流和相电流，使得能够连续地控制半导体激光器的振荡波长。

5. 发明授权

US07411992B2 Light wavelength converting apparatus, control method of the same, and image projecting apparatus using the same 失效
标题翻译：光波长变换装置及其控制方法以及使用其的图像投影装置
公开(公告)号：US07411992B2
公开(公告)日：2008-08-12
申请号：US11120950
申请日：2005-05-04
申请人： Yukio Furukawa , Hajime Sakata , Kazunari Fujii
发明人： Yukio Furukawa , Hajime Sakata , Kazunari Fujii
IPC分类号： H01S3/08
CPC分类号： H01S5/06256 , H01S5/005 , H01S5/0092 , H01S5/02248 , H01S5/0617 , H01S5/06804
摘要： A light wavelength converting apparatus includes a semiconductor laser having gain, phase, and DBR regions, a nonlinear optical device for receiving fundamental-wave light emitted from the semiconductor laser and outputting second harmonic wave light, a first optical detector for monitoring output of the fundamental-wave light, a second optical detector for monitoring the second harmonic wave light, and a control portion for controlling a drive current for driving the semiconductor laser. The control portion includes a control parameter determiner and wavelength controller. The control parameter determiner changes a DBR current supplied to the DBR region and a phase current supplied to the phase region to obtain a changing point, and determines a control parameter for controlling the DBR and phase currents such that the relationship therebetween is not located on the changing point. The wavelength controller controls the DBR and phase currents pursuant to the control parameter.
摘要翻译：光波长转换装置包括具有增益，相位和DBR区域的半导体激光器，用于接收从半导体激光器发射的基波并输出二次谐波光的非线性光学装置，用于监视基波的输出的第一光学检测器波光，用于监测二次谐波光的第二光检测器，以及用于控制用于驱动半导体激光器的驱动电流的控制部分。控制部分包括控制参数确定器和波长控制器。控制参数确定器改变提供给DBR区域的DBR电流和提供给相位区域的相电流以获得改变点，并且确定用于控制DBR和相电流的控制参数，使得它们之间的关系不位于变化点波长控制器根据控制参数控制DBR和相电流。

6. 发明申请

US20050265419A1 Control method of distributed Bragg reflection semiconductor laser, and image projecting apparatus 失效
标题翻译：分布式布拉格反射半导体激光器的控制方法和图像投影装置
公开(公告)号：US20050265419A1
公开(公告)日：2005-12-01
申请号：US11120951
申请日：2005-05-04
申请人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
发明人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
IPC分类号： G03B21/00 , H01S3/10 , H01S5/00 , H01S5/06 , H01S5/0625 , H01S5/068 , H01S5/0683 , H01S5/125 , H04N9/31
CPC分类号： H04N9/3129 , H01S5/005 , H01S5/0092 , H01S5/06256 , H01S5/06804
摘要： A distributed Bragg reflection (DBR) semiconductor laser is controlled in an image projecting apparatus. The image projecting apparatus includes the DBR semiconductor laser which is provided with a phase region and a DBR region, a light wavelength converting device for converting fundamental-wave light emitted from the DBR semiconductor laser into second harmonic wave light, an optical deflector for scanning the second harmonic wave in a one-dimensional or two-dimensional manner, and a modulating portion for modulating the DBR semiconductor laser based on an image signal. In the control method, a coefficient calculating step and a wavelength adjusting step are performed within a non-drawing time during which a drawing signal, which corresponds to the image signal, is absent. In the coefficient calculating step, at least one coefficient in a relationship between a DBR current to be injected into the DBR region and a phase current to be injected into the phase region for continuously shifting the wavelength of the fundamental-wave light is calculated. In the wavelength adjusting step, the DBR current injected into the DBR region and the phase current injected into the phase region are changed based on the relationship such that the second harmonic wave light is adjusted.
摘要翻译：在图像投影装置中控制分布式布拉格反射（DBR）半导体激光器。图像投影装置包括具有相位区域和DBR区域的DBR半导体激光器，用于将从DBR半导体激光器发射的基波光转换为二次谐波光的光波长转换装置，用于扫描一维或二维二次谐波，以及用于基于图像信号调制DBR半导体激光器的调制部分。在控制方法中，系数计算步骤和波长调整步骤在不存在对应于图像信号的绘制信号的非绘制时间内执行。在系数计算步骤中，计算要注入到DBR区域的DBR电流和要注入到用于连续移位基波的波长的相位区域的相电流之间的关系中的至少一个系数。在波长调整步骤中，根据调整二次谐波光的关系，改变注入DBR区域的DBR电流和注入相位区域的相电流。

7. 发明授权

US07512160B2 Control method of distributed Bragg reflection semiconductor laser, and image projecting apparatus 失效
标题翻译：分布式布拉格反射半导体激光器的控制方法和图像投影装置
公开(公告)号：US07512160B2
公开(公告)日：2009-03-31
申请号：US11896142
申请日：2007-08-30
申请人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
发明人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
IPC分类号： H01S3/10 , H01S5/00
CPC分类号： H04N9/3129 , H01S5/005 , H01S5/0092 , H01S5/06256 , H01S5/06804
摘要： A DBR semiconductor laser is controlled in an image projecting apparatus, which includes the DBR laser having a phase and DBR region, a light wavelength converting device for converting fundamental-wave light emitted from the DBR laser into second harmonic wave light, an optical deflector for scanning the second harmonic wave in a one or two-dimensional manner, and a modulating portion for modulating the DBR laser. Coefficient calculating and wavelength adjusting steps are performed within a non-drawing time. The coefficient calculating step calculates at least one coefficient in a relationship between a DBR current to be injected into the DBR region and a phase current to be injected into the phase region for continuously shifting the wavelength of the fundamental-wave light. The wavelength adjusting step changes DBR current injected into the DBR region and phase current injected into the phase region based on the relationship.
摘要翻译： DBR半导体激光器被控制在包括具有相位和DBR区域的DBR激光器的图像投影装置中，用于将从DBR激光器发射的基波光转换成二次谐波光的光波长转换装置，用于以一维或二维方式扫描二次谐波，以及用于调制DBR激光的调制部分。系数计算和波长调整步骤在非绘制时间内执行。系数计算步骤计算要注入到DBR区域的DBR电流和要注入到相位区域中的相电流之间的关系中的至少一个系数，以连续移位基波光的波长。基于该关系，波长调整步骤改变注入DBR区域的DBR电流和注入相位区域的相电流。

8. 发明授权

US07313156B2 Control method of distributed Bragg reflection semiconductor laser, and image projecting apparatus 失效
标题翻译：分布式布拉格反射半导体激光器的控制方法和图像投影装置
公开(公告)号：US07313156B2
公开(公告)日：2007-12-25
申请号：US11120951
申请日：2005-05-04
申请人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
发明人： Kazunari Fujii , Hajime Sakata , Yukio Furukawa
IPC分类号： H01S3/13
CPC分类号： H04N9/3129 , H01S5/005 , H01S5/0092 , H01S5/06256 , H01S5/06804
摘要： A DBR semiconductor laser is controlled in an image projecting apparatus, which includes the DBR laser having a phase and DBR region, a light wavelength converting device for converting fundamental-wave light emitted from the DBR laser into second harmonic wave light, an optical deflector for scanning the second harmonic wave in a one or two-dimensional manner, and a modulating portion for modulating the DBR laser. Coefficient calculating and wavelength adjusting steps are performed within a non-drawing time. The coefficient calculating step calculates at least one coefficient in a relationship between a DBR current to be injected into the DBR region and a phase current to be injected into the phase region for continuously shifting the wavelength of the fundamental-wave light. The wavelength adjusting step changes DBR current injected into the DBR region and phase current injected into the phase region based on the relationship.
摘要翻译： DBR半导体激光器被控制在包括具有相位和DBR区域的DBR激光器的图像投影装置中，用于将从DBR激光器发射的基波光转换成二次谐波光的光波长转换装置，用于以一维或二维方式扫描二次谐波，以及用于调制DBR激光的调制部分。系数计算和波长调整步骤在非绘制时间内执行。系数计算步骤计算要注入到DBR区域的DBR电流和要注入到相位区域中的相电流之间的关系中的至少一个系数，以连续移位基波光的波长。基于该关系，波长调整步骤改变注入DBR区域的DBR电流和注入相位区域的相电流。

9. 发明授权

US07039077B2 Optical wavelength converting apparatus, and optical wavelength converting method 失效
标题翻译：光波长转换装置和光波长转换方法
公开(公告)号：US07039077B2
公开(公告)日：2006-05-02
申请号：US10620419
申请日：2003-07-17
申请人： Yukio Furukawa , Hajime Sakata
发明人： Yukio Furukawa , Hajime Sakata
IPC分类号： H01S3/10
CPC分类号： G02F1/3534 , G02F1/3558
摘要： An optical wavelength converting apparatus includes a first semiconductor laser, a second semiconductor laser, and a wavelength converting element for converting first and second laser light from the first and second semiconductor lasers to sum frequency light. In this apparatus, the first semiconductor laser and the wavelength converting element are arranged so as to establish an external resonator structure in which the first laser light can be put under a resonant condition, and an optical path of the second laser light is so determined that the second laser light can propagate through the wavelength converting element.
摘要翻译：光波长转换装置包括第一半导体激光器，第二半导体激光器和用于将来自第一和第二半导体激光器的第一和第二激光转换为和频光的波长转换元件。在该装置中，第一半导体激光器和波长转换元件被布置成建立其中可以将第一激光置于共振条件下的外部谐振器结构，并且确定第二激光的光路，使得第二激光可以通过波长转换元件传播。

10. 发明授权

US06987785B2 Harmonic generator, method for driving harmonic generator, image-displaying apparatus, image-forming apparatus, optical storage apparatus that employs harmonic generator 失效
公开(公告)号：US06987785B2
公开(公告)日：2006-01-17
申请号：US10404057
申请日：2003-04-02
申请人： Hajime Sakata , Yukio Furukawa
发明人： Hajime Sakata , Yukio Furukawa
IPC分类号： H01S3/10
CPC分类号： B82Y20/00 , G02F1/353 , G02F1/3556 , H01S5/06213 , H01S5/0622 , H01S5/125 , H01S5/32366 , H01S5/34306
摘要： There is provided a harmonic generator generates high power laser light and can be modulated at high modulation rate. The semiconductor laser emits a first output light when a bias current is supplied, and a second output light when a modulating current is superposed to the bias current. On of the first output lights has a wavelength inside of a wavelength tolerance of phase-matching of the wavelength-converting element. The other has a wavelength outside of the wavelength tolerance of phase-matching.

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