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公开(公告)号：US07106778B2
公开(公告)日：2006-09-12
申请号：US10472624
申请日：2002-03-19
IPC分类号： H01S3/08
CPC分类号： H01S5/06256 , H01S5/1212 , H01S5/1215
摘要： A tuneable laser having an active section, a phase section and a Bragg reflector comprising a plurality of discrete grating units, at least two of which gratings have a different pitch, wherein current is applicable to at least the grating having a longer pitch, such that the effective wavelength of the grating having a longer pitch can be tuned to the wavelength of the grating having a shorter pitch. A chirp grating can provide the difference in pitch.
摘要翻译： 一种可调谐激光器，具有有源部分，相位部分和布拉格反射器，其包括多个离散光栅单元，其中至少两个光栅具有不同的间距，其中电流至少可应用于具有较长间距的光栅，使得 可以将具有较长间距的光栅的有效波长调谐到具有较短间距的光栅的波长。 啁啾光栅可以提供间距的差异。
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公开(公告)号：US07088748B2
公开(公告)日：2006-08-08
申请号：US10472254
申请日：2002-03-14
CPC分类号： H01S5/06256 , H01S5/0425 , H01S5/1215
摘要： A tuneable laser having an active section, a phase section and a Bragg reflector comprising a plurality of descrete grating units, at least two of which gratings have a discrete pitch, wherein at least two of the gratings having a different pitch are each provided with a plurality of independently actuable electrodes.
摘要翻译： 一种具有有源部分，相位部分和布拉格反射器的可调激光器，包括多个分离光栅单元，其中至少两个光栅具有离散的间距，其中具有不同间距的至少两个光栅各自设置有 多个可独立致动的电极。
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公开(公告)号：US4101193A
公开(公告)日：1978-07-18
申请号：US767822
申请日：1977-02-11
CPC分类号： G11B7/1362 , G01D15/14 , G02B26/123
摘要： A scanning system which includes a rotatable multifaceted polygon, the faceted surfaces of which are optically reflective; a recording means spaced-apart from the said polygon and adapted to move in a direction parallel to the rotational axis of the polygon; light generating means for generating at least one pair of light beams, the light beams of each pair being directed at different angles onto the faceted surface in a manner whereby the regions of the faceted surface illuminated by the beams are in contact with each other in a non-overlapping relationship; modulating means for modulating the said at least one pair of light beams; and focussing means interposed between the said polygon and the said recording means for focussing each pair of light beams reflected from the said polygon onto the said recording means.
摘要翻译： 一种扫描系统，其包括可旋转的多面多边形，其多面被光学反射; 与所述多边形间隔开并且适于在平行于所述多边形的旋转轴线的方向上移动的记录装置; 用于产生至少一对光束的光产生装置，每对光束以不同的角度被引导到多面的表面上，使得由光束照射的多面的区域在彼此接触的方式 不重叠的关系; 用于调制所述至少一对光束的调制装置; 以及插入所述多边形和所述记录装置之间的聚焦装置，用于将从所述多边形反射的每对光束聚焦到所述记录装置上。
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公开(公告)号：US08295315B2
公开(公告)日：2012-10-23
申请号：US12594213
申请日：2008-04-03
申请人： Andrew John Ward , Robert Walker , David James Robbins , Douglas Charles John Reid , Guy Towlson
发明人： Andrew John Ward , Robert Walker , David James Robbins , Douglas Charles John Reid , Guy Towlson
IPC分类号： H01S3/105
CPC分类号： H01S5/06256 , G02B2006/12107 , H01S5/026 , H01S5/10 , H01S5/1003 , H01S5/1092 , H01S5/1209 , H01S5/1212 , H01S5/141 , H01S5/4062 , H01S5/4068 , H01S5/4087
摘要： The present invention concerns tunable distributed Bragg reflector (DBR) semiconductor lasers, in particular a DBR laser with a branched optical waveguide 5 within which a plurality of differently shaped lasing cavities may be formed, and a method of operation of such a laser. The laser may comprise a phase control section (418), gain section (420, 422), a sampled grating DBR (412) giving a comb-line spectrum and two tunable, chirped DBRs (414, 416) for broadband frequency training and a coupling section (410).
摘要翻译： 本发明涉及可调谐分布布拉格反射器（DBR）半导体激光器，特别是具有分支光波导5的DBR激光器，其中可以形成多个不同形状的激光腔，以及这种激光器的操作方法。 激光器可以包括相位控制部分（418），增益部分（420,422），给出梳状光谱的采样光栅DBR（412）和用于宽带频率训练的两个可调谐啁啾的DBR（414,416），以及 耦合部分（410）。
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公开(公告)号：US20090161717A1
公开(公告)日：2009-06-25
申请号：US12096307
申请日：2006-12-08
CPC分类号： H01S5/06256 , G02B6/02085 , G02B2006/12107 , H01S5/1212 , H01S5/1215
摘要： A Bragg reflector grating comprises a plurality of chirped grating sections (65-72), in which at least a first chirped grating section and a second chirped grating section have differing ranges of grating pitches. The combined range of grating pitches provided by the first and second chirped grating sections includes at least one discontinuity, such that the first and second chirped grating sections have one or more grating pitches in common and/or there are one or more ranges of grating pitches within the combined range of grating pitches that are absent.
摘要翻译： 布拉格反射器光栅包括多个啁啾光栅部分（65-72），其中至少第一啁啾光栅部分和第二啁啾光栅部分具有不同范围的光栅间距。 由第一和第二啁啾光栅部分提供的光栅间距的组合范围包括至少一个不连续性，使得第一和第二啁啾光栅部分具有共同的一个或多个光栅间距和/或存在一个或多个光栅间距范围 在不存在的光栅间距的组合范围内。
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公开(公告)号：US20080232411A1
公开(公告)日：2008-09-25
申请号：US12088136
申请日：2006-09-22
CPC分类号： H01S5/06256 , H01S5/1209 , H01S5/1212 , H01S5/125
摘要： A Bragg grating has a local reflection strength which varies with position along the length of the grating so as to generate a non-uniform wavelength reflection spectrum, enabling compensation for a non-uniform gain profile of the gain section of a tunable laser. In another aspect, a Bragg comb grating is modulated by an envelope function which can also compensate for a non-uniform gain profile. The comb grating may be a phase change grating, with the envelope function shape being controlled by the length between phase changes and/or size of the phase changes.
摘要翻译： 布拉格光栅具有随着沿着光栅长度的位置而变化的局部反射强度，以便产生不均匀的波长反射光谱，能够补偿可调谐激光器的增益部分的不均匀增益分布。 在另一方面，布拉格梳状光栅由包络函数调制，该包络函数也可补偿不均匀增益分布。 梳状光栅可以是相变光栅，其中包络函数形状由相位变化和/或相位变化的大小之间的长度控制。
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公开(公告)号：US06345135B1
公开(公告)日：2002-02-05
申请号：US09306449
申请日：1999-05-06
IPC分类号： G02B634
CPC分类号： G02B6/122 , G02B6/02085 , G02B2006/12104 , G02B2006/12107 , H01S5/12 , H01S5/1209 , H01S5/1246
摘要： A multi-wavelength optical reflector comprises a diffraction grating structure (18) which comprises a plurality of repeat grating units (20) in which each grating unit (20) comprises a series of adjacent diffraction gratings (22, 24, 26) having the same pitch. The grating units (20) and adjacent gratings within a grating unit are separated by a phase change (28) of substantially pi (&pgr; radians). The lengths of the gratings (22, 24, 26), which are different for each grating within a grating unit, are selected so as to provide a predetermined comb reflection spectrum which comprises a plurality of reflection maxima of substantially equal reflectivity.
摘要翻译： 多波长光学反射器包括衍射光栅结构（18），其包括多个重复光栅单元（20），其中每个光栅单元（20）包括一系列具有相同光栅单元的相邻衍射光栅（22,24,26） 沥青。 光栅单元（20）和光栅单元内的相邻光栅被基本上为pi（pi弧度）的相变（28）分开。 选择光栅单元内的每个光栅不同的光栅（22,24,26）的长度，以便提供预定的梳状反射光谱，其包括基本相等的反射率的多个反射最大值。
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公开(公告)号：US08160410B2
公开(公告)日：2012-04-17
申请号：US12096307
申请日：2006-12-08
CPC分类号： H01S5/06256 , G02B6/02085 , G02B2006/12107 , H01S5/1212 , H01S5/1215
摘要： A Bragg reflector grating comprises a plurality of chirped grating sections (65-72), in which at least a first chirped grating section and a second chirped grating section have differing ranges of grating pitches. The combined range of grating pitches provided by the first and second chirped grating sections includes at least one discontinuity, such that the first and second chirped grating sections have one or more grating pitches in common and/or there are one or more ranges of grating pitches within the combined range of grating pitches that are absent.
摘要翻译： 布拉格反射器光栅包括多个啁啾光栅部分（65-72），其中至少第一啁啾光栅部分和第二啁啾光栅部分具有不同范围的光栅间距。 由第一和第二啁啾光栅部分提供的光栅间距的组合范围包括至少一个不连续性，使得第一和第二啁啾光栅部分具有共同的一个或多个光栅间距和/或存在一个或多个光栅间距范围 在不存在的光栅间距的组合范围内。
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公开(公告)号：US07830927B2
公开(公告)日：2010-11-09
申请号：US12088131
申请日：2006-09-26
IPC分类号： H01S3/10
CPC分类号： H01S5/06256 , G02B6/02085 , G02B2006/12107 , H01S5/1209 , H01S5/1212
摘要： A tunable laser comprises a gain section and two or more reflectors. At least one of the reflectors is a Bragg grating comprising a reduced strength section comprising a base order periodic pattern of marks and spaces from at which at least some of the marks or spaces are missing. This enables the reflective strength of the grating to be controlled relative to the other reflector. The Bragg grating may be a phase change grating with individual sections being reduced in strength by line removal.
摘要翻译： 可调谐激光器包括增益部分和两个或更多个反射器。 反射器中的至少一个是布拉格光栅，其包括减小的强度部分，该部分包括标记和间隔的基本定期周期性图案，其中缺少至少一些标记或空格。 这使得能够相对于另一个反射器控制光栅的反射强度。 布拉格光栅可以是相变光栅，其中各个部分通过线移除而强度降低。
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公开(公告)号：US07826508B2
公开(公告)日：2010-11-02
申请号：US12088136
申请日：2006-09-22
IPC分类号： H01S5/00
CPC分类号： H01S5/06256 , H01S5/1209 , H01S5/1212 , H01S5/125
摘要： A Bragg grating has a local reflection strength which varies with position along the length of the grating so as to generate a non-uniform wavelength reflection spectrum, enabling compensation for a non-uniform gain profile of the gain section of a tunable laser. In another aspect, a Bragg comb grating is modulated by an envelope function which can also compensate for a non-uniform gain profile. The comb grating may be a phase change grating, with the envelope function shape being controlled by the length between phase changes and/or size of the phase changes.
摘要翻译： 布拉格光栅具有随着沿着光栅长度的位置而变化的局部反射强度，以便产生不均匀的波长反射光谱，能够补偿可调谐激光器的增益部分的不均匀增益分布。 在另一方面，布拉格梳状光栅由包络函数调制，该包络函数也可补偿不均匀增益分布。 梳状光栅可以是相变光栅，其中包络函数形状由相位变化和/或相位变化的大小之间的长度控制。
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