公开(公告)号：US07382817B2

公开(公告)日：2008-06-03

申请号：US11306520

申请日：2005-12-30

Applicant: Jian-Jun He

Inventor： Jian-Jun He

IPC: H01S3/03

CPC classification number: H01S5/10 ,  H01S5/0612 ,  H01S5/1003 ,  H01S5/101 ,  H01S5/1017 ,  H01S5/1021

Abstract: A semiconductor laser comprises two optical cavities, each comprising an optical waveguide bounded by two partially reflecting elements. The two optical waveguides are disposed on a substrate to form a substantially V-shaped geometry with substantially no cross-coupling at the open end and a predetermined cross-coupling at the closed end for achieving an optimal single-mode selectivity of the laser. The first cavity has a length such that its resonant wavelengths correspond to a set of discrete operating channels. The second cavity has a slightly different length so that only one resonant wavelength coincides with one of the resonant wavelengths of the first cavity over the operating spectral window. The lasing action occurs at the common resonant wavelength. In operation, at least a portion of the optical waveguide in each of the first and the second cavities are forward biased to provide substantially equal round-trip optical gains. The second cavity is tuned by varying the effective refractive index of a portion of the waveguide through an electrical means, resulting in wavelength switching among the set of discrete operating wavelengths as determined by the first cavity.

Abstract translation: 半导体激光器包括两个光学腔，每个光腔包括由两个部分反射元件限定的光波导。 两个光波导设置在基板上以形成基本上V形的几何形状，在开口端基本上没有交叉耦合，并且在封闭端处具有预定的交叉耦合，以实现激光器的最佳单模选择性。 第一腔具有使得其谐振波长对应于一组离散操作通道的长度。 第二腔具有稍微不同的长度，使得仅一个谐振波长与工作光谱窗口上的第一腔的谐振波长之一重合。 激光作用发生在共振谐振波长。 在操作中，第一和第二空腔中的每一个中的光波导的至少一部分被正向偏置以提供基本相等的往返光学增益。 通过通过电气装置改变波导的一部分的有效折射率来调节第二腔，从而在由第一腔确定的离散工作波长组之间进行波长切换。

公开(公告)号：US20050249256A1

公开(公告)日：2005-11-10

申请号：US10908362

申请日：2005-05-09

Applicant: Jian-Jun He

Inventor： Jian-Jun He

IPC: H01S5/00 ,  H01S5/0625

CPC classification number: H01S5/06256

Abstract: A monolithically integrated wavelength switchable laser comprises three coupled Fabry-Perot cavities. The length and consequently the free spectral range of the first cavity are designed such that the resonant peaks correspond substantially to a set of discrete operating wavelengths separated by a constant channel spacing. The second cavity has a slightly different length so that only one resonant peak coincides with one of the resonant peaks of the first cavity over the spectral window of the material gain. The lasing action occurs at the common resonant wavelength. The two cavities are coupled through a third short cavity that produces a certain coupling loss and phase relationship between the first and the second cavities in order to achieve an optimal mode selectivity of the combined cavity laser. In operation, both the first and the second cavities are forward biased to provide optical gains for the laser action. The second cavity is tuned by varying the refractive index of at least a portion of the waveguide within the cavity through an electrical means, resulting in wavelength switching of the laser among the set of discrete operating wavelengths as determined by the first cavity.

Abstract translation: 单片集成波长可切换激光器包括三个耦合的法布里 - 珀罗腔。 第一腔的长度和随后的自由光谱范围被设计成使得谐振峰基本上对应于由恒定沟道间隔分开的一组离散工作波长。 第二腔具有稍微不同的长度，使得只有一个谐振峰与材料增益的光谱窗口上的第一腔的谐振峰之一重合。 激光作用发生在共振谐振波长。 两个空腔通过第三短腔耦合，其在第一和第二腔之间产生一定的耦合损耗和相位关系，以实现组合的腔体激光器的最佳模式选择性。 在操作中，第一和第二腔都被正向偏置以提供用于激光作用的光学增益。 通过电气装置改变腔内波导的至少一部分的折射率来调节第二腔，从而导致激光在由第一腔确定的离散工作波长组中的波长切换。

公开(公告)号：US20050243882A1

公开(公告)日：2005-11-03

申请号：US10908058

申请日：2005-04-26

Applicant: Jian-Jun He ,  Michael Cada

Inventor： Jian-Jun He ,  Michael Cada

IPC: H01S5/00 ,  H01S5/026 ,  H01S5/028 ,  H01S5/10

CPC classification number: H01S5/1021 ,  H01S5/026 ,  H01S5/028 ,  H01S5/0287 ,  H01S5/1025 ,  H01S5/1039 ,  H01S5/1092

Abstract: A monolithically integrated dual-wavelength laser comprises at least three coupled Fabry-Perot cavities in tandem, each separated by a vertically etched air gap of a size that is substantially equal to an odd-integer multiple of quarter-wavelength. The first two cavities are of substantially comparable lengths and are actively pumped to provide gains to the combined cavity laser, and to produce a series of double-peaked lasing modes. The other cavity has a substantially smaller length and acts as an optical filter to select one of the doublets of the combined cavity as the lasing modes. The beating between the two modes of the dual-wavelength laser at a photodetector produces a microwave carrier signal whose frequency can be tuned by adjusting the balance of the injected currents between the two active cavities.

Abstract translation: 单片集成的双波长激光器包括串联的至少三个耦合的法布里 - 珀罗腔，每个腔分别由大体上等于四分之一波长的奇整数倍的垂直蚀刻气隙隔开。 前两个空腔具有基本相当的长度，并被主动地泵送以提供组合腔激光器的增益，并产生一系列双峰值激光模式。 另一个腔具有基本上较小的长度，并且用作滤光器以选择组合腔中的一个之一作为激光模式。 在光电探测器处的双波长激光器的两种模式之间的跳动产生微波载波信号，其频率可以通过调节两个有源腔之间的注入电流的平衡来调谐。

公开(公告)号：US06959129B2

公开(公告)日：2005-10-25

申请号：US09799013

申请日：2001-03-06

Applicant: Jian-Jun He ,  Orazio Berolo ,  Michael Davies

Inventor： Jian-Jun He ,  Orazio Berolo ,  Michael Davies

IPC: G02B5/18 ,  G02B6/12 ,  G02B6/34 ,  G02B6/28

CPC classification number: G02B6/12007 ,  G02B6/12009 ,  G02B2006/12107

Abstract: A bidirectional multiplexer and demultiplexer based on a single waveguide grating is presented. In one embodiment of the invention, the device contains a multi/demultiplexer having an echelle grating disposed between a plurality of input channels and a plurality of output channel arrays. The input and output channels are assigned in a particular order, such that the multiplex and demultiplex functions have the same wavelength channels and such that the blaze angle of the grating facets are optimized simultaneously for both the multiplex and demultiplex function. Because the optical signals are multiplexed and demultiplexed by the same dispersive element, problems of mismatching performance introduced by using different optical components are obviated. The input/output waveguides of the dual-function device can be coupled to a single fiber array, thus reducing the packaging cost.

Abstract translation: 提出了一种基于单波导光栅的双向多路复用器和解复用器。 在本发明的一个实施例中，该装置包含一个具有设置在多个输入通道与多个输出通道阵列之间的梯形光栅的多路分离器。 以特定顺序分配输入和输出通道，使得多路复用和解复用功能具有相同的波长信道，并且使得对于复用和解复用功能都同时优化光栅面的发光角度。 由于光信号被相同的分散元件复用和解复用，所以消除了通过使用不同的光学部件引入的不匹配性能的问题。 双功能器件的输入/输出波导可以耦合到单个光纤阵列，从而降低了封装成本。

公开(公告)号：US06753958B2

公开(公告)日：2004-06-22

申请号：US10102833

申请日：2002-03-22

Applicant: Orazio Berolo ,  Jian-Jun He ,  Emil S. Koteles ,  Bryant Hichwa ,  John Wade

Inventor： Orazio Berolo ,  Jian-Jun He ,  Emil S. Koteles ,  Bryant Hichwa ,  John Wade

IPC: G01J328

CPC classification number: G02B6/4215 ,  G01J3/0256 ,  G01J3/0259 ,  G01J3/0294 ,  G01J3/18 ,  G02B6/12007

Abstract: A waveguide optical monitor is disclosed. The device has an optical input port coupled through a switch to a plurality of input waveguides. A dispersive element disperses light within the input optical waveguides toward a plurality of output waveguides. There are a plurality of photodetectors each optically coupled to an output waveguide. The photodectors are for sensing an intensity of light within the waveguide with which it is optically coupled. An optical switch in optical communication with the optical input port and for switching light received at the optical input port to one of the plurality of input waveguides. Also, an angular dispersive element is present for receiving light from any one of the waveguides and for dispersing the light toward a plurality of output waveguides in dependence upon the input waveguide position and a wavelength of the light such that light directed from the first of the plurality of input waveguides toward the plurality of output waveguides has a first centre wavelength within each of the output waveguides and light directed from the second of the plurality of input waveguides toward the plurality of output waveguides has a second different centre wavelength within each of the output waveguides, the second different centre wavelength different form any first centre wavelength.

Abstract translation: 公开了一种波导光学监视器。 该装置具有通过开关耦合到多个输入波导的光输入端口。 分散元件将光输送到输入光波导内朝向多个输出波导。 存在多个光电检测器，每个光电检测器光耦合到输出波导。 光电探测器用于感测与光学耦合的波导内的光强度。 光开关，其与所述光输入端口光通信并将在所述光输入端口处接收的光切换到所述多个输入波导中的一个。 此外，存在用于从任何一个波导接收光的角度色散元件，并且用于根据输入波导位置和光的波长将光分散到多个输出波导，使得从第一个 朝向多个输出波导的多个输入波导具有在每个输出波导内的第一中心波长，并且从多个输入波导中的第二个朝着多个输出波导引导的光在每个输出波导内具有第二不同的中心波长 波导，第二不同的中心波长不同形成任何第一中心波长。

公开(公告)号：US06701034B2

公开(公告)日：2004-03-02

申请号：US09982253

申请日：2001-10-19

Applicant: Jian-Jun He ,  André Delage

Inventor： Jian-Jun He ,  André Delage

IPC: G02B626

CPC classification number: G02F1/3138 ,  G02B2006/12145 ,  G02F2201/122

Abstract: In a digital optical switch, an input waveguide and two output waveguides form a Y-shaped splitter or switch. Electrodes are positioned on each output waveguide at the junction with the input waveguide. The electrodes extend as narrow strips across the waveguides. The inner edges of the electrodes are curved to form a smooth continuation profile to the signal paths to reduce losses.

Abstract translation: 在数字光开关中，输入波导和两个输出波导形成Y形分束器或开关。 电极位于与输入波导的连接处的每个输出波导上。 电极通过波导延伸成窄条。 电极的内边缘是弯曲的，以形成对信号路径的平滑持续分布，以减少损耗。

公开(公告)号：US07447246B2

公开(公告)日：2008-11-04

申请号：US11161294

申请日：2005-07-28

Applicant: Jian-Jun He

Inventor： Jian-Jun He

IPC: H01S3/10

CPC classification number: H01S5/0265 ,  H01S5/026 ,  H01S5/06256 ,  H01S5/06258 ,  H01S5/1017 ,  H01S5/1021 ,  H01S5/1039 ,  H01S5/12 ,  H01S5/1228 ,  H01S5/125

Abstract: A Q-modulated semiconductor laser comprises an optical gain section and an electro-absorptive modulator section, separated by a vertically etched air gap acting as a partially reflecting mirror. The modulator section is placed inside an anti-resonant Fabry-Perot cavity and acts as the rear reflector of the laser. The change of the absorption coefficient in the modulator section results in a change in the Q-factor of the laser, and consequently the lasing threshold and output power. Different embodiments are disclosed, which involve a distributed feedback (DFB) laser, a Fabry-Perot laser, a distributed Bragg reflector (DBR) laser, or a wavelength switchable multi-cavity laser. The integrated Q-modulated laser has advantages of high speed, high extinction ratio, low wavelength chirp and low cost.

Abstract translation: Q调制的半导体激光器包括由用作部分反射镜的垂直蚀刻气隙分开的光学增益部分和电吸收调制器部分。 调制器部分放置在反谐振法布里 - 珀罗腔内，并用作激光器的后反射器。 调制器部分的吸收系数的变化导致激光器的Q因子的变化，从而导致激光阈值和输出功率。 公开了涉及分布式反馈（DFB）激光器，法布里 - 珀罗激光器，分布式布拉格反射器（DBR）激光器或波长可切换多腔体激光器的不同实施例。 集成Q调制激光器具有高速，高消光比，低波长啁啾和低成本的优点。

公开(公告)号：US20060251139A1

公开(公告)日：2006-11-09

申请号：US11306520

申请日：2005-12-30

Applicant: Jian-Jun He

Inventor： Jian-Jun He

IPC: H01S5/00 ,  H01S3/06 ,  H01S3/14 ,  H01S3/04 ,  H01S3/07

CPC classification number: H01S5/10 ,  H01S5/0612 ,  H01S5/1003 ,  H01S5/101 ,  H01S5/1017 ,  H01S5/1021

Abstract: A semiconductor laser comprises two optical cavities, each comprising an optical waveguide bounded by two partially reflecting elements. The two optical waveguides are disposed on a substrate to form a substantially V-shaped geometry with substantially no cross-coupling at the open end and a predetermined cross-coupling at the closed end for achieving an optimal single-mode selectivity of the laser. The first cavity has a length such that its resonant wavelengths correspond to a set of discrete operating channels. The second cavity has a slightly different length so that only one resonant wavelength coincides with one of the resonant wavelengths of the first cavity over the operating spectral window. The lasing action occurs at the common resonant wavelength. In operation, at least a portion of the optical waveguide in each of the first and the second cavities are forward biased to provide substantially equal round-trip optical gains. The second cavity is tuned by varying the effective refractive index of a portion of the waveguide through an electrical means, resulting in wavelength switching among the set of discrete operating wavelengths as determined by the first cavity.

Abstract translation: 半导体激光器包括两个光学腔，每个光腔包括由两个部分反射元件限定的光波导。 两个光波导设置在基板上以形成基本上V形的几何形状，在开口端基本上没有交叉耦合，并且在封闭端处具有预定的交叉耦合，以实现激光器的最佳单模选择性。 第一腔具有使得其谐振波长对应于一组离散操作通道的长度。 第二腔具有稍微不同的长度，使得仅一个谐振波长与工作光谱窗口上的第一腔的谐振波长之一重合。 激光作用发生在共振谐振波长。 在操作中，第一和第二空腔中的每一个中的光波导的至少一部分被正向偏置以提供基本相等的往返光学增益。 通过通过电气装置改变波导的一部分的有效折射率来调节第二腔，从而在由第一腔确定的离散工作波长组之间进行波长切换。

公开(公告)号：US06768841B2

公开(公告)日：2004-07-27

申请号：US10097738

申请日：2002-03-15

Applicant: Jian-Jun He

Inventor： Jian-Jun He

IPC: G02B626

CPC classification number: G02B6/12007 ,  G02B6/29326 ,  G02B6/29328 ,  G02B6/29386

Abstract: A grating based optical de-interleaver useful over a wide wavelength range is presented. An echelle grating is used as dispersive element. The spectral response of the device is cyclic. The free spectral range of the grating is designed to separate wavelength channels to be de-interleaved. This device, being bi-directional will also operate as an interleaver.

Abstract translation: 提出了一种在宽波长范围内有用的基于光栅的光学去交织器。 梯形光栅用作色散元件。 器件的光谱响应是循环的。 光栅的自由光谱范围被设计成分离待交错的波长通道。 该设备双向还将作为交织器运行。

公开(公告)号：US06654533B1

公开(公告)日：2003-11-25

申请号：US09669765

申请日：2000-09-26

Applicant: Emil S. Koteles ,  Jian-Jun He ,  Michael Davies

Inventor： Emil S. Koteles ,  Jian-Jun He ,  Michael Davies

IPC: G02B610

CPC classification number: G02B6/132 ,  G02B6/124 ,  G02B6/134 ,  G02B2006/12078 ,  G02B2006/12107 ,  G02B2006/12164

Abstract: A homogeneous semiconductor waveguide structure having an undoped core layer and doped cladding layers on both sides of the core layer is proposed wherein the waveguide core is substantially thick providing polarization independence. Because of the cladding layers having low refractive index contrast with respect to the core and being on opposing sides resulting in a substantially symmetrical structure, the waveguide, can be made single-mode with low polarization sensitivity, thus improving characteristics for conducting light therein. Furthermore, the enlarged mode size increases coupling efficiency. Also, since the waveguide is grown from a single semiconductor composition lattice matched to the substrate, wafer uniformity and reproducibility are enhanced. The three layer structure reduces birefringence sufficiently that a yield enhancing etch stop layer can be added to the structure without substantially adverse effects.

Abstract translation: 提出了一种均匀的半导体波导结构，其具有未掺杂的芯层和在芯层的两侧上的掺杂包层，其中波导芯基本上是厚的，提供极化独立性。 由于包层相对于芯具有低的折射率对比度并且在相对的两侧产生基本上对称的结构，所以波导可以制成具有低偏振灵敏度的单模，从而改善在其中传导光的特性。 此外，放大的模式尺寸增加耦合效率。 此外，由于波导从与衬底匹配的单个半导体组成晶格生长，晶片的均匀性和再现性增强。 三层结构足够减少双折射，使得增强的增强蚀刻停止层可以添加到结构中而没有实质上的不利影响。