公开(公告)号：US20050018715A1

公开(公告)日：2005-01-27

申请号：US10868668

申请日：2004-06-14

Applicant: Deepak Varshneya ,  John Roes ,  Tony Maryfield ,  Mike Roes ,  Lew Goldberg ,  Jean Delavoux ,  Gabor Kulcsar

Inventor： Deepak Varshneya ,  John Roes ,  Tony Maryfield ,  Mike Roes ,  Lew Goldberg ,  Jean Delavoux ,  Gabor Kulcsar

IPC: H01S3/067 ,  H01S3/091 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/102 ,  H01S3/23 ,  H01S3/30 ,  H01S5/062 ,  H01S5/068 ,  H01S5/12

CPC classification number: H01S3/06704 ,  H01S3/0078 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/09415 ,  H01S3/1024 ,  H01S3/2375 ,  H01S5/0078 ,  H01S5/06216 ,  H01S5/068 ,  H01S5/12 ,  H01S2301/02

Abstract: A pulsed fiber laser and associated electronics contained in a miniature package is disclosed. The Pulsed Fiber Laser Source (PFLS) can be a single-stage high gain master oscillator power amplifier (MOPA) type fiber laser source. The PFLS can include a distributed feedback (DFB) laser, a narrowband optical filter, a broad area high-power pump diode, and Erbium/Ytterbium (Er/Yb) double cladding doped fiber. Input electrical pulses drive the DFB laser diode to emit optical pulses that are then amplified by the optical amplifier. Active and passive cooling elements may be incorporated for continuous operation without rest time. Passive cooling for intermittent pulsed applications allows the laser source to be miniaturized by eliminating active cooling elements and associated power supplies and controllers. Low duty cycle relaxes drive requirements and further reduces the size. The PFLS can be used for long distance ranging, communication by retro-modulation, and communication in presence of atmospheric attenuation.

Abstract translation: 公开了一种包含在微型封装中的脉冲光纤激光器和相关电子装置。 脉冲光纤激光源（PFLS）可以是单级高增益主振荡器功率放大器（MOPA）型光纤激光源。 PFLS可以包括分布式反馈（DFB）激光器，窄带滤光器，广域大功率泵浦二极管和铒/镱（Er / Yb）双包层掺杂光纤。 输入电脉冲驱动DFB激光二极管发出光脉冲，然后由光放大器放大。 主动和被动冷却元件可以并入，用于连续操作而不需要休息时间。 用于间歇脉冲应用的无源冷却允许通过消除主动冷却元件和相关电源和控制器来使激光源小型化。 低占空比减轻驱动要求，进一步减小尺寸。 PFLS可用于长距离测距，通过逆向调制进行通信，以及在存在大气衰减的情况下进行通信。

公开(公告)号：US06608951B1

公开(公告)日：2003-08-19

申请号：US09722271

申请日：2000-11-28

Applicant: Lew Goldberg ,  Marc Le Flohic

Inventor： Lew Goldberg ,  Marc Le Flohic

IPC: G02B626

CPC classification number: H01S3/067 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/094011 ,  H01S3/094019

Abstract: A method and apparatus for high power, broad gain, high efficiency, low noise, cladding pumped fiber amplifiers and lasers. The present invention utilizes a fiber taper in which the inner cladding decreases from a wide to narrow portion with the fiber core remaining the same diameter. The apparatus includes a light guiding section and a light source. The light guiding section has a cladding layer surrounding a fiber core with a fiber taper. The light source is arranged to couple pump light into the side of the cladding layer at the wide diameter portion. The pump light essentially propagates along the tapered portion towards the narrow diameter portion.

Abstract translation: 一种用于大功率，宽增益，高效率，低噪声，包层泵浦光纤放大器和激光器的方法和装置。 本发明利用纤维锥体，其中内包层从纤维芯保持相同的直径从宽到窄部分减小。 该装置包括导光部和光源。 导光部分具有围绕具有纤维锥度的纤维芯的包覆层。 光源布置成将泵浦光在宽直径部分处耦合到包层的侧面。 泵浦灯基本上沿着锥形部分朝向窄直径部分传播。

公开(公告)号：US06337660B1

公开(公告)日：2002-01-08

申请号：US08122671

申请日：1993-09-17

Applicant: Ronald D. Esman ,  Lew Goldberg

Inventor： Ronald D. Esman ,  Lew Goldberg

IPC: H01Q322

CPC classification number: H01Q3/2676 ,  G02B6/2861 ,  H01Q3/2682

Abstract: The fiber-optic true time-delay array antenna feed is a device for dynamically generating a plurality of identical electromagnetic radiation (EMR) signals with continuously variable time-delay separations. The EMR signal to be transmitted modulates a continuous-wave optical signal from a laser source which is applied to a plurality of high dispersion single-mode optical fibers acting as synchronized true time-delay modulators forming an array antenna feed system. Each fiber is chosen to have the same nominal time delay but a different net dispersion. Photodetectors convert the optical intensity back into an EMR electrical signal to feed each of the elements of the array antenna.

Abstract translation: 光纤真实时间延迟阵列天线馈送是用于动态地产生具有连续可变时间延迟分离的多个相同电磁辐射（EMR）信号的装置。 要传输的EMR信号调制来自激光源的连续波光信号，激光源被施加到形成阵列天线馈送系统的作为同步真时延调制器的多个高色散单模光纤。 选择每个光纤具有相同的标称时间延迟，但具有不同的净色散。 光电检测器将光强度转换回EMR电信号以馈送阵列天线的每个元件。

公开(公告)号：USH1965H1

公开(公告)日：2001-06-05

申请号：US08714876

申请日：1996-09-17

Applicant: William K. Burns ,  Lew Goldberg ,  Wayne McElhanon

Inventor： William K. Burns ,  Lew Goldberg ,  Wayne McElhanon

IPC: H01S310

Abstract: A bulk, quasi-periodic phase-matched difference-frequency (DFG) process in field-poled LiNbO3 bulk crystal permits continuous tunability of the output radiation in the 3.0-4.1 &mgr;m wavelength range through grating rotation. DFG in QPM-LiNbO3 crystal, carried out using a Nd:YAG laser and a high power semiconductor laser at the quasi-phased matching (QPM) degeneracy point, results in an ultra wide 0.5 &mgr;m acceptance bandwidth, permitting crystal rotation-free wavelength tuning of 4.0-4.5 &mgr;m, with 0.2 mW output power at 4.5 &mgr;m.

公开(公告)号：USH1702H

公开(公告)日：1998-01-06

申请号：US369437

申请日：1995-01-06

Applicant: Ronald D. Esman ,  Lew Goldberg ,  Edward Alexander ,  Keith J. Williams

Inventor： Ronald D. Esman ,  Lew Goldberg ,  Edward Alexander ,  Keith J. Williams

IPC: H04B10/155 ,  H04B10/02 ,  H04B10/04 ,  H04B10/06

CPC classification number: H04B10/564 ,  H04B10/505

Abstract: In the transmission electrical signals using an optical carrier the signal power carried by an optical carrier is proportional to the optical power. High optical power levels are desired for optical carriers that are modulated by weak electrical signals, however, significant unmodulated power is left in the original carrier after processing. To maximize the radio frequency (RF) signal power generated by a given (maximized) photodetector current (for a given input power), in this invention, the optical carrier power is reduced. This is accomplished by the addition of a narrowband optical filter, such as a Fabry-Perot filter, to reduce the average optical carrier power without reducing the modulation sidebands, which results in an increased modulation depth. Therefore, greater RF and microwave power is generated by a photodetector with the same photocurrent. With a laser source exhibiting a beam whose linewidth is narrow compared to the filter bandwidth, the filter is tuned, or frequency locked, to match the filtering resonance with the optical carrier wavelength. With the high finesse filter and narrow-linewidth laser beam, the frequency range of operation is extended from the filter half-bandwidth to the next resonance of the filter. Thus, broadband effective gain results without introducing additional noise.

Abstract translation: 在使用光载波的传输电信号中，由光载波承载的信号功率与光功率成正比。 对于由弱电信号调制的光载波，需要高的光功率电平，然而，处理后原始载波中仍然存在明显的未调制功率。 为了最大化给定（最大化）光电检测器电流（对于给定输入功率）产生的射频（RF）信号功率，在本发明中，光载波功率降低。 这通过添加诸如法布里 - 珀罗滤波器之类的窄带滤光器来实现，以减少平均光载波功率而不减少调制边带，这导致增加的调制深度。 因此，具有相同光电流的光电检测器产生更大的RF和微波功率。 使用具有与滤波器带宽相比线宽窄的波束的激光源，滤波器被调谐或频率锁定以使滤波谐振与光载波波长匹配。 利用高精度滤波器和窄线宽激光束，操作的频率范围从滤波器半带宽扩展到滤波器的下一个谐振。 因此，宽带有效增益不会引入额外的噪声。

公开(公告)号：US5651019A

公开(公告)日：1997-07-22

申请号：US430953

申请日：1995-04-28

Applicant: Lew Goldberg ,  Michael L. Dennis ,  Ishwar Aggarwal

Inventor： Lew Goldberg ,  Michael L. Dennis ,  Ishwar Aggarwal

IPC: G03F7/20 ,  H01S3/108 ,  H01S3/14

CPC classification number: G03F7/704 ,  H01S3/108

Abstract: A blue laser source outputting a beam having a wavelength of approximately 460 nm. A first laser cavity is formed around a Nd:YAG gain medium generating a first light beam having a wavelength of approximately 1064 nm. A second laser cavity, at least partially coextensive with the first laser cavity is formed around a Tm:ZBLAN gain medium generating a second light beam having a wavelength of approximately 810 nm. A non-linear KTP crystal is provided intracavity to both the first and second laser cavities to mix the first light beam and the second light beam and output a third light beam having a wavelength of approximately 460 nm. One of the mirrors forming the first or second laser cavity is coated to output a laser beam having a wavelength of approximately 460 nm.

Abstract translation: 输出波长为约460nm的光束的蓝色激光源。 在Nd：YAG增益介质周围形成第一激光腔，产生具有约1064nm波长的第一光束。 在Tm：ZBLAN增益介质周围形成至少部分与第一激光腔共同延伸的第二激光腔，产生具有约810nm的波长的第二光束。 在第一和第二激光腔内部提供非线性KTP晶体，以混合第一光束和第二光束，并输出波长为约460nm的第三光束。 形成第一或第二激光腔的反射镜之一被涂覆以输出波长为约460nm的激光束。

公开(公告)号：US4907238A

公开(公告)日：1990-03-06

申请号：US370965

申请日：1989-06-26

Applicant: Myung K. Chun ,  Lew Goldberg ,  Joseph F. Weller

Inventor： Myung K. Chun ,  Lew Goldberg ,  Joseph F. Weller

IPC: G02F1/37 ,  H01S5/40

CPC classification number: H01S5/4006 ,  G02F1/37

Abstract: An apparatus for generating coherent radiation at a desired frequency is disclosed. In a preferred embodiment the apparatus comprises: an injection-locked semiconductor diode structure having a large active area for emitting a diffraction-limited beam at a preselected frequency; optics for focusing the diffraction-limited beam into a focused beam; a nonlinear crystal responsive to the focused beam for producing a beam of laser power which includes an output beam at a desired harmonic of the preselected frequency; and a device for passing the output beam in a given direction. In a modification of the preferred embodiment, the output of the injection-locked semiconductor diode structure is mixed with an emission from a laser source in the nonlinear crystal to produce a desired sum or difference frequency.

Abstract translation: 公开了一种以期望的频率产生相干辐射的装置。 在优选实施例中，该装置包括：具有大的有源区域的注入锁定半导体二极管结构，用于以预选频率发射衍射受限束; 用于将衍射受限束聚焦到聚焦光束中的光学器件; 响应于聚焦光束的非线性晶体，用于产生激光功率束，其包括在预选频率的期望谐波处的输出光束; 以及用于沿给定方向通过输出光束的装置。 在优选实施例的修改中，注入锁定半导体二极管结构的输出与来自非线性晶体中的激光源的发射混合以产生期望的和频或差频。

公开(公告)号：US4503541A

公开(公告)日：1985-03-05

申请号：US440685

申请日：1982-11-10

Applicant: Joseph F. Weller ,  Lew Goldberg

Inventor： Joseph F. Weller ,  Lew Goldberg

IPC: H01S5/026 ,  H01S5/06 ,  H01S5/065 ,  H01S5/14 ,  H01S3/19

CPC classification number: H01S5/065 ,  H01S5/0601 ,  H01S5/14 ,  H01S5/026

Abstract: Laser linewidth is controlled by reflecting a certain portion of the laser light back into the laser cavity. This control is accomplished by aligning the active layer on an electroabsorptive cell with the active layer of a semiconductor laser on a single substrate with a first waveguide therebetween. Light from the laser is guided by the first waveguide to the electroabsorptive cell whose light absorption is electronically controlled. The laser light propagates through the active region in the electroabsorptive cell and then is guided by a second waveguide to a reflection facet. The laser light is reflected by this reflection facet back through the waveguide-cell-waveguide-laser light path. The foregoing device can be formed using either a monolithic or a hybrid design.

Abstract translation: 通过将激光的某一部分反射回激光腔来控制激光线宽。 该控制是通过将电吸收性电池上的有源层与半导体激光器的有源层在单个衬底上进行对准来实现的，其中第一波导在其间。 来自激光器的光由第一波导引导到电吸收光电池，其电吸收被电子控制。 激光传播通过电吸收单元中的有源区，然后被第二波导引导到反射面。 激光由该反射面反射通过波导管 - 波导 - 激光光路。 上述装置可以使用单片或混合设计来形成。

公开(公告)号：US4503403A

公开(公告)日：1985-03-05

申请号：US536588

申请日：1983-09-28

Applicant: Henry F. Taylor ,  Lew Goldberg ,  Christen Rauscher ,  Joseph F. Weller

Inventor： Henry F. Taylor ,  Lew Goldberg ,  Christen Rauscher ,  Joseph F. Weller

IPC: H01S3/23 ,  H03L7/24 ,  H03B17/00

CPC classification number: H01S3/10092 ,  H03L7/24

Abstract: The optical injection-locking of an FET oscillator is accomplished by injecting the beat signal between two coherently mixed slave lasers, which are locked to different harmonics of a modulated master laser, into the FET oscillator to be locked. 120 GHz injection-locking beat signals are possible using this technique.

Abstract translation: FET振荡器的光注入锁定通过将被锁定到调制主激光器的不同谐波的两个相干混合从激光器之间的拍频信号注入到要被锁定的FET振荡器中来实现。 使用这种技术可以实现120 GHz的注射锁定拍频信号。