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1. 发明授权

US06556599B1 External cavity laser using angle-tuned filter and method of making same 失效
标题翻译：使用角度调谐滤波器的外腔激光器及其制作方法
公开(公告)号：US06556599B1
公开(公告)日：2003-04-29
申请号：US09688873
申请日：2000-10-17
申请人： Mikelis Nils Svilans
发明人： Mikelis Nils Svilans
IPC分类号： H01S310
CPC分类号： H01S5/141 , H01S3/1062
摘要： An external cavity laser comprises a light source unit, preferably comprising a semiconductor light source having internal optical gain and a collimating lens, for supplying substantially collimated light to a retroreflector via an angle-tuned filter extending across an optical axis of the light source. The retroreflector is positioned so as to receive light from the light source via the angle-tuned filter and reflect the light via the angle-tuned filter back to the light source. The retroreflector may comprise a quarter pitch graded-index (GRIN) lens having a proximal end surface oriented towards the light source and a distal end surface opposite thereto, with a mirror provided on the distal end surface, preferably as a high-reflectance coating. The angle-tuned filter may be attached to the proximal end surface of the GRIN lens, preferably as a coating. The GRIN lens may be tilted in order to vary the angle of the filter relative to the optical axis and hence the wavelength. Where the external cavity laser is to be wavelength-adjustable in use, the external cavity laser may further comprise a tuning mechanism for tilting the angle-tuned filter. Alternatively, the tilt angle of the angle-tuned filter may be adjusted and then fixed during manufacture using a separate tilting mechanism which is not a part of the external cavity laser itself.
摘要翻译：外腔激光器包括光源单元，其优选地包括具有内部光学增益的半导体光源和准直透镜，用于经由经过光源的光轴延伸的角度调节的滤光器将近似准直的光提供给后向反射器。后向反射器被定位成经由角度调节滤波器接收来自光源的光，并通过角度调节的滤光器将光反射回光源。后向反射器可以包括具有朝向光源定向的近端表面和与其相对的远端表面的四分之一间距渐变折射率（GRIN）透镜，反射镜设置在远端表面上，优选地作为高反射率涂层。角度调节过滤器可以附接到GRIN透镜的近端表面，优选地作为涂层。可以倾斜GRIN透镜以改变滤光器相对于光轴的角度并因此改变波长。在使用外腔激光器要波长可调的地方，外腔激光器还可以包括用于倾斜角度调谐滤波器的调谐机构。或者，可以调整角度调谐滤波器的倾斜角度，然后在制造期间使用不是外部腔体激光器本身的一部分的单独的倾斜机构来调整倾斜角度。

2. 发明授权

US06222200B1 Photodetector with spectrally extended responsivity 有权
标题翻译：光电探测器具有光谱扩展的响应能力
公开(公告)号：US06222200B1
公开(公告)日：2001-04-24
申请号：US09294114
申请日：1999-04-19
申请人： Mikelis Nils Svilans
发明人： Mikelis Nils Svilans
IPC分类号： H01L2906
CPC分类号： B82Y20/00 , H01L31/035236 , H01L31/036 , H01L31/1035 , H01L31/105
摘要： A photodetector has an extended wavelength range combined with high responsivity and reliability. It includes an active region having alternating compressive and tensile strain layers arranged so that the total effective strain of the active region is balanced. The thickness of each layer is limited so that a product of a thickness by strain is not exceeding about 20% nm to avoid formation of crystalline defects. The layers with higher optical absorption constant are made thicker than the layers with lower absorption constant to provide the required responsivity of the detector. In one embodiment, the active region is formed on InP substrate and includes alternating 0.25% compressive strain and 1.03% tensile strain layers of InGaAs composition, the compressive strain layers being approximately four times thicker. In another embodiment interfaces between the layers are compositionally graded. The described structure of the active region may be used in various types of photodetectors, e.g., PIN, APD, MSM, Shottky barrier and waveguide photodetectors. Depending on the materials used, the photodetector is capable of operating in a wide wavelength range, e.g. up to 2200 nm, and covering a wide range of temperatures, including cryogenic temperatures.
摘要翻译：光电检测器具有扩展的波长范围，结合高响应性和可靠性。其包括具有交替的压缩和拉伸应变层的有源区域，其布置成使得有源区域的总有效应变平衡。每层的厚度受到限制，使得通过应变的厚度乘积不超过约20％nm以避免形成结晶缺陷。具有较高光吸收常数的层比具有较低吸收常数的层更厚，以提供检测器所需的响应度。在一个实施例中，有源区形成在InP衬底上并且包括交替的0.25％压缩应变和1.03％的InGaAs组合物的拉伸应变层，压缩应变层大约是厚度的四倍。在另一个实施方案中，层之间的界面被组成分级。有源区的所述结构可用于各种类型的光电探测器，例如PIN，APD，MSM，肖特基势垒和波导光电检测器。根据所使用的材料，光电检测器能够在宽的波长范围内操作，例如，高达2200 nm，覆盖范围广泛，包括低温。

3. 发明授权

US06915030B2 Optical spectrum analyzer 有权
标题翻译：光谱分析仪
公开(公告)号：US06915030B2
公开(公告)日：2005-07-05
申请号：US10705866
申请日：2003-11-13
申请人： Mikelis Nils Svilans , Philip Duggan , Paul Colbourne
发明人： Mikelis Nils Svilans , Philip Duggan , Paul Colbourne
IPC分类号： G01J3/12 , G02B6/34 , G02B6/12
CPC分类号： G02B6/12019 , G01J3/12 , G02B6/12007
摘要： An optical spectrum analyzer for analyzing at least n wavelengths of light is disclosed having a tunable filter with an input port and an output port and a periodic output response with a free spectral range FSR and having a bandwidth B. An AWG is optically coupled to receive light from the output port; and for distributing the light spatially at other locations in a wavelength dependent manner. Optically coupled with the AWG are m detectors for detecting wavelength or channel information. The number of detectors, m is less than n when a single detector is associated with a single channel; and m is less than 2n when two detectors are associated with a single channel.
摘要翻译：公开了一种用于分析至少n个波长的光的光谱分析仪，其具有带有输入端口和输出端口的可调谐滤波器以及具有自由光谱范围F SR SR并具有带宽B的周期性输出响应 AWG被光学耦合以从输出端口接收光; 并且用于以波长依赖的方式将光在空间上分布在其他位置。与AWG光学耦合是用于检测波长或信道信息的m个检测器。当单个检测器与单个通道相关联时，检测器的数量m小于n; 当两个检测器与单个信道相关联时，m小于2n。

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