公开(公告)号：US20010014106A1

公开(公告)日：2001-08-16

申请号：US09758041

申请日：2001-01-11

Inventor： Spartak Gevorgian ,  Nils Calander ,  Mats Karlsson ,  Mattias Nilsson ,  Joakim Een ,  Anders Larsson

IPC: H01S003/10

CPC classification number: H03B28/00 ,  H01S5/0623 ,  H01S5/0656 ,  H01S5/4068 ,  H01S5/423

Abstract: Microwaves are generated by heterodyning the outputs of two or more optical lasers which have differing central frequencies to produce beat frequencies in the microwave range. One of the beat frequencies is used to modulate the output of at least one of the lasers so as to produce sidebands which differ from the central frequency by an integral number of the sideband frequency. Each laser is connected to one of the other lasers by a weak optical link to optically injection lock the laser to the sideband of the other laser.

Abstract translation: 通过对具有不同中心频率的两个或多个光学激光器的输出进行外差来产生微波，以在微波范围内产生拍频。 拍频之一用于调制至少一个激光器的输出，以便产生与中心频率不同的边带频率的整数倍的边带。 每个激光器通过弱光连接器连接到其他激光器之一，以将激光器光学注射锁定到另一激光器的边带。

公开(公告)号：US6166837A

公开(公告)日：2000-12-26

申请号：US444471

申请日：1999-11-22

Applicant: Laura Ellen Adams ,  Clyde George Bethea ,  Lars Erik Eskildsen ,  Gerald Nykolak ,  Roosevelt People ,  Tawee Tanbun-Ek

Inventor： Laura Ellen Adams ,  Clyde George Bethea ,  Lars Erik Eskildsen ,  Gerald Nykolak ,  Roosevelt People ,  Tawee Tanbun-Ek

IPC: H04B10/02 ,  H01S5/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/125 ,  H04B10/18 ,  H04B10/28 ,  H04J14/02

CPC classification number: H01S5/06258 ,  H01S5/0623 ,  H01S5/0625

Abstract: A tunable semiconductor laser comprises a gain section having an MQW active region, a uniform pitch grating DFB region, and first waveguide. A composite reflector, including a second MQW region and a second waveguide, forms a cavity resonator with the DFB region. A tuning voltage applied to the composite reflector induces refractive index changes, thereby allowing the center wavelength to be altered. A dither signal applied the composite reflector broadens the spectrum of the laser output, thereby reducing SBS in fiber optic systems

Abstract translation: 可调谐半导体激光器包括具有MQW有源区，均匀间距光栅DFB区和第一波导的增益部。 包括第二MQW区域和第二波导的复合反射器与DFB区域形成空腔谐振器。 施加到复合反射器的调谐电压引起折射率变化，从而允许改变中心波长。 施加复合反射器的抖动信号使激光输出的频谱变宽，从而减少光纤系统中的SBS

公开(公告)号：US5781334A

公开(公告)日：1998-07-14

申请号：US793141

申请日：1997-02-19

Applicant: Rene Daendliker ,  Rudolf Thalmann

Inventor： Rene Daendliker ,  Rudolf Thalmann

IPC: G01B9/02 ,  G01J9/02 ,  H01S3/13 ,  H01S3/23 ,  H01S5/062 ,  H01S5/0687 ,  H01S5/40 ,  G02F2/02

CPC classification number: H01S5/4025 ,  H01S5/0687 ,  H01S5/0623 ,  H01S5/4087

Abstract: The invention concerns the generation of synthetic light wavelengths in which light from a first light source (D.sub.1) is coupled into a common light path section (L.sub.G1) and its average frequency value (.nu..sub.1) is locked with a resonant frequency (.nu..sub.1) of the Fabry-Perot resonator (R). The light from a second light source (D.sub.2) is coupled into the common light path section (L.sub.G1) and its average frequency value (.nu..sub.2) is set in order to reach a subsequent resonant frequency (.nu..sub.2) of the Fabry-Perot resonator (R) and be locked therewith. A beat frequency (.DELTA..nu..sub.12), which is measured by electronic counters whilst a corresponding measured frequency value (f.sub.12) is prepared, is formed between the frequencies (.nu..sub.1, .nu..sub.2) of the light from the two light sources (D.sub.1, D.sub.2). The light from at least one further light source (D.sub.i) is coupled into the common light path section (L.sub.G1) and its average frequency value (.nu..sub.i) is first adapted to the average frequency value (.nu..sub.1 or .nu..sub.2) of one of the above light sources (D.sub.1, D.sub.2) and then altered until it reaches a pre-determined resonance of the Fabry-Perot resonator (R) and is locked therewith, the number (k.sub.1) of resonances passed through being counted. The beat frequency (.DELTA..nu..sub.1i or .DELTA..nu..sub.2i) between the frequency (.nu..sub.1 or .nu..sub.2) of the light from the selected light source (D.sub.1 or D.sub.2) and from the further light source (D.sub.i) is calculated as the product (k.sub.1 .times..DELTA..nu..sub.12 or k.sub.1 +1.times..DELTA..nu..sub.12) of the beat frequency (.DELTA..nu..sub.12) between the frequencies (.nu..sub.1, .nu..sub.2) of the light from the first and second light sources (D.sub.1, D.sub.2) and the number (k.sub.i or k.sub.1 +1) of resonances passed through.

公开(公告)号：US5379309A

公开(公告)日：1995-01-03

申请号：US106445

申请日：1993-08-16

Applicant: Ronald T. Logan, Jr.

Inventor： Ronald T. Logan, Jr.

IPC: G02F2/00 ,  H01S5/062 ,  H01S5/40 ,  H04J14/02 ,  H01S3/098

CPC classification number: H03B28/00 ,  H01S5/4006 ,  G02F2/002 ,  H01S5/0623 ,  H01S5/4025 ,  H01S5/4087 ,  H04J14/02

Abstract: Two independent laser oscillators are injection-locked to different optical modes of a mode-locked laser, then combined and detected to produce the heterodyne output signal in the microwave to submillimeter wave frequency band. Since the phase fluctuations of the mode-locked laser modes are highly correlated, the phase fluctuations of the heterodyne output signal are greatly reduced, providing a low phase-noise oscillator signal. Since the modes of the mode-locked laser can span hundreds of GigaHertz, the oscillator can be employed to generate microwave, millimeter wave or submillimeter wave frequencies.

Abstract translation: 两个独立的激光振荡器被注入锁定到锁模激光器的不同光学模式，然后组合和检测以产生微波到亚毫米波频带的外差输出信号。 由于锁模激光模式的相位波动高度相关，外差输出信号的相位波动大大降低，提供低的相位噪声振荡器信号。 由于锁模激光器的模式可以跨越几百千兆赫兹，振荡器可用于产生微波，毫米波或亚毫米波频率。

公开(公告)号：US12080993B2

公开(公告)日：2024-09-03

申请号：US18183395

申请日：2023-03-14

Applicant: FUNDACIÓ INSTITUT DE CIÉNCIES FOTÓNIQUES ,  03;Institució Catalana de Recerca | Estudis Avancats

Inventor： Valerio Pruneri ,  Carlos Abellan Sanchez ,  Waldimar Amaya ,  Morgan Mitchell

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/068 ,  G06F7/58 ,  H01S5/026 ,  H01S5/183

CPC classification number: H01S5/0427 ,  H01S5/06213 ,  H01S5/06226 ,  H01S5/0623 ,  H01S5/06812 ,  G06F7/588 ,  H01S5/0264 ,  H01S5/183

Abstract: A method for physical random number generation includes the steps of: modulating the gain of a vertical-cavity surface-emitting laser periodically from the lower threshold to the upper threshold and back; maintaining the gain per round trip positive for a longer period than the round trip time of the cavity; maintaining the net gain per round trip negative for a longer period than the round trip time of the cavity, in order to create optical pulses of random amplitude; detecting the optical pulses; converting the optical pulses into electrical analog pulses; and digitising the electrical analog pulses into random numbers.

公开(公告)号：US09143094B2

公开(公告)日：2015-09-22

申请号：US14469166

申请日：2014-08-26

Applicant: NATIONAL CHENG KUNG UNIVERSITY

Inventor： Sheng-Kwang Hwang ,  Yu-Han Hung

IPC: H01S3/00 ,  H03F3/08 ,  H03F3/21 ,  H01S5/062 ,  G02F1/35

CPC classification number: H03F3/08 ,  G02F1/3538 ,  H01S5/0623 ,  H01S5/5054 ,  H03F2200/393 ,  H04B10/25759

Abstract: Period-one nonlinear dynamics of semiconductor lasers are utilized to provide an apparatus for photonic microwave power amplification in radio-over-fiber links through optical modulation depth improvement. The microwave power amplification apparatus includes a microwave-modulated optical signal generation module and a microwave power amplification module. The amplification capability of the present microwave power amplification apparatus covers a broad microwave range, from less than 25 GHz to more than 60 GHz, and a wide gain range, from less than 10 dB to more than 30 dB. The microwave phase quality is mainly preserved while the microwave power is largely amplified, improving the signal-to-noise ratio up to at least 25 dB. The bit-error ratio at 1.25 Gb/s is better than 10−9 and a sensitivity improvement of up to at least 15 dB is feasible.

Abstract translation: 半导体激光器的周期性非线性动力学被用于通过光调制深度改进来提供用于光纤无线电链路中的光子微波功率放大的装置。 微波功率放大装置包括微波调制光信号发生模块和微波功率放大模块。 本微波功率放大装置的放大能力涵盖从小于25GHz到大于60GHz的宽微波范围，以及从小于10dB到大于30dB的宽增益范围。 微波相位质量主要保持在微波功率大幅度放大，提高信噪比达到至少25 dB。 1.25 Gb / s的误码率优于10-9，灵敏度提高至少达到15 dB是可行的。

公开(公告)号：US20120257645A1

公开(公告)日：2012-10-11

申请号：US13081135

申请日：2011-04-06

Applicant: Bernd SARTORIUS

Inventor： Bernd SARTORIUS

IPC: H01S3/10

CPC classification number: H01S5/0623 ,  H01S5/0261 ,  H01S5/0265 ,  H01S5/06258 ,  H01S5/1014 ,  H01S5/1092 ,  H01S5/1228 ,  H01S2302/02

Abstract: The invention relates to a beat signal generating device for use in a Terahertz system, comprising a first monomode laser for generating radiation of a first wavelength; a second monomode laser for generating radiation of a second wavelength different from the first wavelength; a first and a second output port; a phase modulating unit for modifying both the phase of radiation generated by the first laser and the phase of radiation generated the second laser, wherein the beat signal generating device is configured in such a way that the radiation generated by the first laser is transmitted through the second laser and superposed with the radiation generated by the second laser at the second output port, and the radiation generated by the second laser is transmitted through the first laser and superposed with the radiation generated by the first laser at the first output port, such that a first beat signal will be emitted at the first output port and a second beat signal will be emitted at the second output port, wherein the phase between the first and the second beat signal can be adjusted by means of the phase modulating unit. The invention also relates to a Terahertz system and the use of a beat signal generating device.

Abstract translation: 本发明涉及一种在太赫兹系统中使用的拍频信号发生装置，包括用于产生第一波长的辐射的第一单模激光器; 用于产生不同于第一波长的第二波长的辐射的第二单体激光器; 第一和第二输出端口; 相位调制单元，用于修改由第一激光器产生的辐射相位和产生第二激光器的辐射相位，其中，拍频信号产生装置被配置成使得由第一激光器产生的辐射通过 与第二激光器在第二输出端口产生的辐射叠加，并且由第二激光器产生的辐射透射通过第一激光器并与第一激光器在第一输出端口处产生的辐射叠加，使得 在第一输出端口处将发出第一差拍信号，并且在第二输出端口处发出第二拍频信号，其中可以通过相位调制单元来调整第一和第二拍频信号之间的相位。 本发明还涉及一种太赫兹系统和使用节拍信号产生装置。

公开(公告)号：US20110192978A1

公开(公告)日：2011-08-11

申请号：US12908628

申请日：2010-10-20

Applicant: Min Yong JEON ,  Kyung Hyun PARK ,  Dae-Su YEE

Inventor： Min Yong JEON ,  Kyung Hyun PARK ,  Dae-Su YEE

IPC: G01D5/30 ,  G02F1/35 ,  H01S3/10 ,  G02F1/365

CPC classification number: H01S5/0623 ,  G02F2/002 ,  H01S1/02 ,  H01S5/141 ,  H01S5/40 ,  H01S5/4012

Abstract: Provided is a terahertz wave apparatus. The terahertz wave apparatus includes: a wavelength-fixed laser emitting a first laser light having a fixed first wavelength; a wavelength-swept laser emitting a second laser light having a tunable second wavelength; a coupler coupling the first laser light with the second laser light; and a generator converting a mixed light emitted from the coupler into a terahertz wave, wherein a frequency of the terahertz wave is continuously tunable.

Abstract translation: 提供了一种太赫兹波装置。 太赫波装置包括：发射具有固定的第一波长的第一激光的波长固定的激光; 发射具有可调谐的第二波长的第二激光的波长扫描激光; 将所述第一激光与所述第二激光耦合的耦合器; 以及将从耦合器发射的混合光转换成太赫兹波的发生器，其中太赫兹波的频率是连续可调的。

公开(公告)号：US07864824B2

公开(公告)日：2011-01-04

申请号：US12506073

申请日：2009-07-20

Applicant: Kyung Hyun Park ,  Jaeheon Shin ,  Namje Kim ,  Chul-Wook Lee ,  Eundeok Sim ,  Sang-Pil Han ,  Yongsoon Baek

Inventor： Kyung Hyun Park ,  Jaeheon Shin ,  Namje Kim ,  Chul-Wook Lee ,  Eundeok Sim ,  Sang-Pil Han ,  Yongsoon Baek

IPC: H01S3/04

CPC classification number: H01S5/06258 ,  B82Y20/00 ,  H01S5/0265 ,  H01S5/0612 ,  H01S5/0623 ,  H01S5/1017 ,  H01S5/1231 ,  H01S5/34306

Abstract: Provided is a multiple distributed feedback laser device. The laser device includes an active layer, a first diffraction grating, and a second diffraction grating. The substrate includes a first distributed feedback region, a modulation region, and a second distributed feedback region. The first diffraction grating is coupled to the active layer in the first distributed feedback region. The second diffraction grating is coupled to the active layer in the second distributed feedback region. In addition, the laser device includes a first micro heater and a second micro heater. The first micro heater supplies heat to the first diffraction grating. The second micro heater supplies heat to the second diffraction grating. The first micro heater and the second micro heater are controlled independently from each other.

Abstract translation: 提供了一种多分布式反馈激光装置。 激光装置包括有源层，第一衍射光栅和第二衍射光栅。 衬底包括第一分布反馈区域，调制区域和第二分布反馈区域。 第一衍射光栅耦合到第一分布反馈区域中的有源层。 第二衍射光栅耦合到第二分布反馈区域中的有源层。 此外，激光装置包括第一微加热器和第二微加热器。 第一微加热器向第一衍射光栅提供热量。 第二微加热器向第二衍射光栅提供热量。 第一微加热器和第二微加热器彼此独立地控制。

公开(公告)号：US07769298B2

公开(公告)日：2010-08-03

申请号：US12238065

申请日：2008-09-25

Applicant: Koji Igarashi ,  Yoshihiro Emori ,  Atsushi Oguri ,  Shu Namiki ,  Osamu Aso ,  Masateru Tadakuma

Inventor： Koji Igarashi ,  Yoshihiro Emori ,  Atsushi Oguri ,  Shu Namiki ,  Osamu Aso ,  Masateru Tadakuma

IPC: H04B10/12

CPC classification number: G02F1/365 ,  G02F1/3513 ,  G02F2203/17 ,  G02F2203/26 ,  H01S5/0623 ,  H04B10/25077 ,  H04B10/291

Abstract: The present invention provides a pulse train generator comprising: a dual-frequency signal light source for generating a dual-frequency signal; a soliton shaper for soliton-shaping output light from the dual-frequency signal light source; and an adiabatic soliton compressor for performing adiabatic soliton compression on output light from the soliton shaper, and also provides a waveform shaper used in this pulse train generator, including a plurality of highly nonlinear optical transmission lines and a plurality of low-nonlinearity optical transmission lines which has a nonlinearity coefficient lower than that of the plurality of highly nonlinear optical transmission lines and which has a second-order dispersion value of which an absolute value is different from that of the plurality of highly nonlinear optical transmission lines. Further, the present invention provides a light source comprising a plurality of continuous light sources of which at least one oscillates in a multimode; a multiplexer for multiplexing output light from the continuous light sources; and a nonlinear phenomenon producer for producing a nonlinear phenomenon on output light from the multiplexer so as to suppress SBS (Stimulated Brillouin Scattering).

Abstract translation: 本发明提供一种脉冲串发生器，包括：用于产生双频信号的双频信号光源; 用于孤子整形的孤子整形器来自双频信号光源的输出光; 以及用于对来自孤子整形器的输出光进行绝热孤子压缩的绝热孤子压缩器，并且还提供在该脉冲串发生器中使用的波形整形器，包括多个高度非线性的光传输线和多个低非线性光传输线 其具有比多个高度非线性光传输线的非线性系数低的非线性系数，并且具有绝对值与多个高度非线性光传输线的绝对值不同的二阶色散值。 此外，本发明提供了一种光源，其包括至少一个以多模振荡的多个连续光源; 多路复用器，用于复用来自连续光源的输出光; 以及用于在来自多路复用器的输出光上产生非线性现象以抑制SBS（受激布里渊散射）的非线性现象产生器。