公开(公告)号：US20020114373A1

公开(公告)日：2002-08-22

申请号：US10080492

申请日：2002-02-22

Applicant: Altitun AB

Inventor： Jan-Olof Joel Wesstrom

IPC: H01S003/10 ,  H01S003/08

CPC classification number: H01S5/06258 ,  H01S5/1032 ,  H01S5/1228

Abstract: An approach for compensating for losses in a tunable laser filter comprising includes providing a tunable waveguide material and an amplifying material that have different compositions. The tuning material and the amplifying material are placed parallel to one another. The amplifying material is disposed so that it covers the tuning material at discrete locations. Carriers are injected simultaneously into both materials. The tuning material is spaced from the amplifying material at an average distance that is greater than the charge carrier diffusion length, so as to reduce avoid diffusion of charge carriers from the tuning material into the amplifying material. This prevents the amplifying material draining the charge carriers out of the tuning material, thus enabling the refractive index of the tuning material to be tuned for a desired wavelength effect.

Abstract translation: 用于补偿可调激光滤波器中的损耗的方法包括提供具有不同组成的可调波导材料和放大材料。 调谐材料和放大材料彼此平行放置。 放大材料被布置成使得其在离散位置处覆盖调谐材料。 载体同时注入两种材料。 调谐材料与放大材料间隔大于电荷载流子扩散长度的平均距离，以便减少避免载流子从调谐材料扩散到放大材料中的扩散。 这样可以防止放大材料将电荷载流子排出调谐材料，从而使调谐材料的折射率能够被调谐到期望的波长效应。

公开(公告)号：US20030021305A1

公开(公告)日：2003-01-30

申请号：US09915046

申请日：2001-07-25

Applicant: Altitun AB

Inventor： Lennart P. O. Lundqvist

IPC: H01S003/10 ,  H01S005/00 ,  H01S003/08

CPC classification number: H01S5/06256 ,  H01S5/1209

Abstract: A wide band reflector, for example a wideband grating reflector is provided as the output coupler of a semiconductor laser. This permits the semiconductor laser to be integrated with other components on a single semiconductor substrate, if desired, without requiring that the laser beam be emitted from the tuning element. Thus, the laser can be tuned over a wide bandwidth with efficient power extraction and high wavelength selectivity.

Abstract translation: 提供宽带反射器，例如宽带光栅反射器作为半导体激光器的输出耦合器。 如果需要，这允许半导体激光器与单个半导体衬底上的其它部件集成，而不需要激光束从调谐元件发射。 因此，可以通过有效的功率提取和高波长选择性在宽带宽上调谐激光。

公开(公告)号：US20020113670A1

公开(公告)日：2002-08-22

申请号：US10080491

申请日：2002-02-22

Applicant: Altitun AB

Inventor： Jan-Olof Joel Wesstrom

IPC: H01P001/20

CPC classification number: G02F1/3133 ,  G02B6/12007 ,  G02B2006/12107 ,  G02B2006/12147 ,  G02F2001/0152 ,  G02F2001/3135 ,  G02F2201/30 ,  H01S3/0632 ,  H01S3/2308

Abstract: A tunable waveguide filter, formed from two waveguides, has an improved selectivity. The filter is tuned by passing a current through the filter. One of the waveguides is a semi-active waveguide. The increased absorption of charge carriers that occurs when current is injected into the semi-active waveguide is compensated by gain enhancement in the waveguide, because the material used for the semi-active waveguide is selected to provide an appropriate amount of gain. Therefore, the gain compensates for the losses that arise from free carrier absorption when the tuning current is applied to the filter.

Abstract translation: 由两个波导形成的可调波导滤波器具有改进的选择性。 通过传递电流通过滤波器来调整滤波器。 波导中的一个是半有源波导。 由于用于半有源波导的材料被选择以提供适当量的增益，所以当电流注入半有源波导时发生的电荷载流子的增加的吸收被波导中的增益增强所补偿。 因此，当调谐电流施加到滤波器时，增益补偿由自由载流子吸收引起的损耗。

公开(公告)号：US20030108071A1

公开(公告)日：2003-06-12

申请号：US10014277

申请日：2001-12-11

Applicant: Altitun AB

Inventor： Gunnar Hedin ,  Johan Erik Fredrik Tegin

IPC: H01S003/098 ,  H01S003/13

CPC classification number: H01S5/0687 ,  H01S5/4087

Abstract: In an apparatus and method for locking the wavelength of a laser, a fringe-producing optical element is disposed directly in the in the output beam from the laser. The fringe-producing optical element produces a fringe pattern in a second light beam derived from the output beam. The fringe pattern is detected by a detector unit. Signals generated by the detector unit are used to generate a laser tuning control signal that tunes the laser to a desired operating wavelength.

Abstract translation: 在用于锁定激光器的波长的装置和方法中，边缘产生光学元件直接设置在来自激光器的输出光束中。 产生条纹的光学元件在从输出光束得到的第二光束中产生条纹​​图案。 条纹图案由检测器单元检测。 由检测器单元生成的信号用于产生激光调谐控制信号，其将激光调谐到期望的工作波长。

公开(公告)号：US20030107746A1

公开(公告)日：2003-06-12

申请号：US10014278

申请日：2001-12-11

Applicant: Altitun AB

Inventor： Gunnar Hedin ,  Johan Erik Fredrik Tegin

IPC: G01B009/02

CPC classification number: G01J9/0246 ,  H01S5/0687

Abstract: An apparatus for locking the wavelength of a laser uses a non-planar etalon, for example a non-parallel etalon, to produce a periodic spatial interference pattern, typically in the light reflected from the etalon. The apparatus also uses a detector to detect the spatial interference pattern having at least three separate detector elements, commonly referred to as pixels. The etalon and the detector are matched to each other so that adjacent pixels detect a specific portion of the phase of the periodic interference pattern.

Abstract translation: 用于锁定激光波长的装置使用非平面标准具，例如非平行标准具，以产生通常在从标准具反射的光中产生的周期性空间干涉图案。 该装置还使用检测器来检测具有通常称为像素的至少三个单独的检测器元件的空间干涉图案。 标准具和检测器彼此匹配，使得相邻像素检测周期性干涉图案的相位的特定部分。

公开(公告)号：US20030048976A1

公开(公告)日：2003-03-13

申请号：US09949597

申请日：2001-09-10

Applicant: Altitun AB

Inventor： Lennart P.O. Lundqvist

IPC: G02B006/12

CPC classification number: H01S5/0265 ,  G02F1/0147 ,  G02F2001/0157 ,  H01S5/0607

Abstract: An electro-absorption modulator is tunable along with the laser. Tuning the electro-absorption modulator permits optimum detuning to be maintained, even though the laser is tuned over several tens of nm. One approach to tuning the electro-absorption modulator is to heat the electro-absorption modulator. A semiconductor laser device includes a semiconductor laser positioned on a substrate. The semiconductor laser produces output light that is tunable over a tuning range between a first wavelength and a second wavelength. An electro-absorption modulator is disposed to modulate the light produced by the semiconductor laser. The operating temperature of the electro-absorption modulator is tunable so as to maintain constant detuning over at least a portion of the tuning range.

Abstract translation: 电吸收调制器与激光一起是可调谐的。 调谐电吸收调制器可以保证最佳的失谐，即使激光被调谐到几十nm。 调整电吸收调制器的一种方法是加热电吸收调制器。 半导体激光装置包括位于基板上的半导体激光器。 半导体激光器产生可在第一波长和第二波长之间的调谐范围内调节的输出光。 设置电吸收调制器以调制由半导体激光器产生的光。 电吸收调制器的工作温度是可调谐的，以便在调谐范围的至少一部分上保持恒定的失谐。

公开(公告)号：US20020181519A1

公开(公告)日：2002-12-05

申请号：US10189030

申请日：2002-07-02

Applicant: Altitun AB

Inventor： Kennet Vilhelmsson ,  Bjorn Broberg ,  Robert Plastow

IPC: H01S003/13

CPC classification number: G01J9/0246 ,  G01J2009/0257 ,  H01S3/1305 ,  H01S5/06256 ,  H01S5/0687 ,  H01S5/1209

Abstract: The present invention relates to an approach to locking the output wavelength of a laser that uses an etalon having non-parallel surfaces. Under this approach, the non-parallel etalon is formed from a readily available, low cost optical component, and may include an etalon with a wedged shape or with at least one curved surface. This approach offers significant advantages over the use of a planar etalon. It provides two degrees of freedom in alignment of the device, and so both the absolute wavelength and the spacing between the interference fringes can be independently adjusted. It also reduces the cost and difficulty of assembly, since it utilizes standard optical parts with wide tolerances. The invention may be used within a standard laser package. The invention also permits the laser to be tuned to a precise operating wavelength by setting various tuning signals according to values stored in memory.

Abstract translation: 本发明涉及锁定使用具有非平行表面的标准具的激光器的输出波长的方法。 在这种方法下，非平行标准具由容易获得的低成本光学部件形成，并且可以包括具有楔形形状或至少一个弯曲表面的标准具。 这种方法比使用平面标准具提供了显着的优点。 它提供了器件对准的两个自由度，因此绝对波长和干涉条纹之间的间隔都可以独立调整。 它也降低了组装的成本和难度，因为它采用了宽公差的标准光学部件。 本发明可以在标准激光器封装内使用。 本发明还允许通过根据存储在存储器中的值设置各种调谐信号来将激光器调谐到精确的工作波长。

公开(公告)号：US20030108072A1

公开(公告)日：2003-06-12

申请号：US10015151

申请日：2001-12-11

Applicant: Altitun AB

Inventor： Gunnar Hedin

IPC: H01S003/13

CPC classification number: H01S5/0687 ,  H01S5/005 ,  H01S5/06837

Abstract: A method for locking the wavelength of a laser uses a non-planar etalon, for example a non-parallel etalon, to produce a periodic spatial interference pattern, typically in the light reflected from the non-planar etalon. At least three different portions of the interference pattern are detected to generate at least three respective detection signals. A feedback signal is generated using the detection signals, and the operating wavelength of the laser is adjusted in response to the feedback signal.

Abstract translation: 用于锁定激光器波长的方法使用非平面标准具，例如非平行标准具，以产生周期性空间干涉图案，通常在从非平面标准具反射的光中。 检测干涉图案的至少三个不同部分以产生至少三个相应的检测信号。 使用检测信号产生反馈信号，并且响应于反馈信号调整激光器的工作波长。

公开(公告)号：US20030048992A1

公开(公告)日：2003-03-13

申请号：US09949595

申请日：2001-09-10

Applicant: Altitun AB

Inventor： Lennart P.O. Lundqvist

IPC: G02B006/26 ,  G02B006/34 ,  G02F001/035

CPC classification number: G02F1/025 ,  G02B6/30 ,  G02B6/4204 ,  G02B2006/12107 ,  G02B2006/12142 ,  G02B2006/12147 ,  G02F2201/302 ,  H01S5/0265

Abstract: The output beam from a laser may be modulated using a coupled waveguide modulator that may be endfire coupled to the laser, or integrally formed on a common substrate with the laser, thereby providing a monolithic laser/modulator system that may manufactured using a high-volume semiconductor manufacturing process. The coupled waveguide modulator includes a substrate having a coupler region and an output region. A first waveguide on the substrate is parallel to an optical axis. A second waveguide is formed proximate the first waveguide, is parallel to the optical axis, and is separated from the first waveguide by a coupling distance in at least the coupler region. The second waveguide is nonparallel to the optical axis and separated from the first waveguide by at least the coupling distance in at least part of the output region.

Abstract translation: 可以使用耦合的波导调制器来调制来自激光器的输出光束，所述耦合波导调制器可以端激光耦合到激光器，或者与激光器一体地形成在公共基板上，从而提供可以使用高容量制造的单片激光/调制器系统 半导体制造工艺。 耦合波导调制器包括具有耦合器区域和输出区域的衬底。 基板上的第一波导与光轴平行。 在第一波导附近形成第二波导，平行于光轴，并且在至少耦合器区域中与第一波导分离耦合距离。 第二波导不平行于光轴并且在至少部分输出区域中至少与耦合距离与第一波导分开。