公开(公告)号：US20100091804A1

公开(公告)日：2010-04-15

申请号：US12519404

申请日：2006-12-22

Applicant: Maurizio Musio ,  Giacomo Antonio Rossi ,  Attilio Braghieri ,  Marcello Tienforti

Inventor： Maurizio Musio ,  Giacomo Antonio Rossi ,  Attilio Braghieri ,  Marcello Tienforti

IPC: H01S3/10 ,  H01S5/14 ,  H01S5/024

CPC classification number: H01S5/141 ,  H01S5/02248 ,  H01S5/024 ,  H01S5/02415 ,  H01S5/02438 ,  H01S5/0612

Abstract: The present invention relates to a wavelength tuneable external-cavity laser module, the laser being tuneable across a predetermined wavelength range and comprising: a thermally stabilised substrate; a gain medium for emitting an optical beam passing through the external cavity along an optical axis, said gain medium being placed in thermal contact with the thermally stabilised substrate; an end mirror for receiving and reflecting the optical beam within the external cavity, and a phase element for controlling the phase of the optical beam and being positioned within the external cavity between the gain medium and the end mirror, wherein said phase element comprises a material having a refractive index that varies in response to changes in temperature and has a transmissivity substantially independent of wavelength across said predetermined wavelength range. The thermally-controllable phase element in the laser external cavity is configured so as to induce a phase variation that compensates the drop in the output power due to ageing or to external temperature variation. According to a preferred embodiment, a heating element is placed in thermal contact to the phase element. The temperature of the phase element can be increased to “bring back” the output power to a value very close to the initial value. Preferably, the phase element is a silicon plate. By thermally controlling an intra-cavity phase element it is possible to vary continuously the output power as a function of the injection current. Therefore, the solution has the advantage that it is possible to configure the ECL to laser at a desired value of the output power selected along a mono tonic function of the injection current.

Abstract translation: 本发明涉及一种波长可调外腔激光器模块，该激光器可在整个预定波长范围内调节，并包括：热稳定的基板; 用于沿着光轴发射穿过所述外部空腔的光束的增益介质，所述增益介质被放置成与所述热稳定的衬底热接触; 用于接收和反射外部空腔内的光束的端面镜，以及用于控制光束的相位并位于增益介质和端镜之间的外部空腔内的相位元件，其中所述相位元件包括材料 具有响应于温度变化而变化的折射率，并且具有基本上与所述预定波长范围上的波长无关的透射率。 激光外部空腔中的热控制相位元件被配置为引起相位变化，其补偿由于老化或外部温度变化引起的输出功率的下降。 根据优选实施例，加热元件被放置成与相元件热接触。 相位元件的温度可以增加，以将输出功率“返回”到非常接近初始值的值。 优选地，相元件是硅板。 通过热控制腔内相位元件，可以连续地改变作为注入电流的函数的输出功率。 因此，该解决方案具有以下优点：可以将ECL激光器沿着注入电流的单重功能选择的输出功率的期望值配置。

公开(公告)号：US20110136063A1

公开(公告)日：2011-06-09

申请号：US12966619

申请日：2010-12-13

Applicant: Alessandro Nottola ,  Umberto Colombo ,  Giorgio Cataldo Mutinati ,  Stefano Sardo

Inventor： Alessandro Nottola ,  Umberto Colombo ,  Giorgio Cataldo Mutinati ,  Stefano Sardo

IPC: G03F7/20

CPC classification number: G02B6/42 ,  G02B6/4214 ,  G02B2006/12104 ,  G03F7/2022 ,  G03F7/203 ,  G03F7/7045

Abstract: A method of fabricating a turning mirror for an optical device includes the steps of depositing on a substrate, which defines a plane in which an optical signal propagates in a propagating direction, a photoresist layer sensitive to electrons and to UV radiation. The material in which the photoresist layer is formed, has a contrast not larger than 3. A first portion of the photoresist layer is exposed to an electron beam, wherein the electron dose of the electron beam exposure is varied within the first portion according to a selected pattern, and wherein the electron does to which a given region in the photoresist is exposed, depends on the resulting photoresist height in the given region after development. A second portion of the photoresist layer is exposed to UV radiation; the first and the second portions are overlapped at least in a third portion. The photoresist layer is developed so as to form in the third portion of the photoresist layer exposed to both electron beam and to UV radiation a first surface having an angle relative to the propagating direction. The substrate and the photoresist are etched so that a second angled surface is formed in the substrate in correspondence to the third portion. The second surface forms an angle with the propagating direction.

Abstract translation: 一种制造用于光学器件的转向镜的方法包括以下步骤：在限定光学信号沿传播方向传播的平面的基板上沉积对电子敏感的光致抗蚀剂层和UV辐射。 其中形成光致抗蚀剂层的材料具有不大于3的对比度。光致抗蚀剂层的第一部分暴露于电子束，其中电子束曝光的电子剂量根据第一部分在第一部分内变化 选择的图案，并且其中光致抗蚀剂中给定区域暴露的电子取决于显影后给定区域中得到的光致抗蚀剂高度。 光致抗蚀剂层的第二部分暴露于紫外线辐射; 第一部分和第二部分至少在第三部分中重叠。 显影光致抗蚀剂层以便在暴露于电子束和UV辐射的光致抗蚀剂层的第三部分中形成相对于传播方向具有一角度的第一表面。 对衬底和光致抗蚀剂进行蚀刻，使得在衬底中形成与第三部分相对应的第二倾斜表面。 第二表面与传播方向形成一角度。

公开(公告)号：US20100183312A1

公开(公告)日：2010-07-22

申请号：US12513993

申请日：2006-11-09

Applicant: Lorenzo Bolla ,  Paola Galli ,  Silvia Ghidini ,  Giorgio Grasso ,  Marco Romagnoli ,  Luciano Socci

Inventor： Lorenzo Bolla ,  Paola Galli ,  Silvia Ghidini ,  Giorgio Grasso ,  Marco Romagnoli ,  Luciano Socci

IPC: H04J14/02

CPC classification number: G02B6/29395 ,  G02B6/12007 ,  G02B6/29343 ,  G02B6/29383 ,  H04J14/0206 ,  H04J14/021

Abstract: The method for filtering an optical signal comprising a plurality of channels lying on a grid of optical frequencies equally spaced by a frequency spacing and occupying an optical bandwidth, comprises: a) operating an optical filter comprising a plurality of resonators each having a respective free spectral range, wherein a first resonator of the plurality is optically coupled to the optical signal and the remaining resonators are optically coupled in series to the first resonator, so that a respective resonance of each one of the plurality of resonators falls within a first frequency band having bandwidth less than or equal to 15 GHz; b) operating the optical filter so as to obtain a separation between any resonance of at least one resonator falling within the optical bandwidth with respect to a resonance of at least another different resonator nearest to the any resonance, the separation being greater than or equal to 150 GHz and no more than 1 THz; c) tuning all the resonators of the optical filter so as to move all respective resonances of the resonators by a respective frequency interval greater than the frequency spacing while maintaining a distance between the any resonance of the at least one resonator with respect to the nearest resonance of the at least another different resonator not less than 150 GHz and no more than 1 THz; and d) operating the optical filter so that a further respective resonance of each one of the plurality of resonators falls within a second frequency band, different from the first frequency band, having bandwidth less than or equal to 15 GHz. A corresponding device for filtering an optical signal is disclosed.

Abstract translation: 用于过滤光信号的方法包括位于以频率间隔等间隔并占据光带宽的光频率网格上的多个通道的方法，包括：a）操作包括多个谐振器的滤光器，每个谐振器各自具有相应的自由光谱 范围，其中多个第一谐振器光学耦合到光信号，并且剩余的谐振器与第一谐振器串联光耦合，使得多个谐振器中的每一个谐振器的相应谐振落在具有 带宽小于或等于15GHz; b）操作所述滤光器，以便获得落入所述光学带宽内的至少一个谐振器的任何谐振与至少另一不同谐振器的谐振之间的距离，所述至少另一不同谐振器最接近所述谐振，所述分离大于或等于 150 GHz，不超过1 THz; c）调整所述滤光器的所有谐振器，以使所述谐振器的所有相应谐振移动大于所述频率间隔的相应频率间隔，同时保持所述至少一个谐振器的所述谐振之间相对于所述最近谐振的距离 的至少另一个不同的谐振器，不小于150GHz且不超过1THz; 以及d）操作所述滤光器，使得所述多个谐振器中的每一个的进一步的各自的谐振落入具有小于或等于15GHz的带宽的与所述第一频带不同的第二频带内。 公开了一种用于滤波光信号的相应装置。

公开(公告)号：US07573919B2

公开(公告)日：2009-08-11

申请号：US10573895

申请日：2003-11-07

Applicant: Susanna Maria Cattelan ,  Andrea Romano ,  Marco De Donno ,  Aurelio Pianciola

Inventor： Susanna Maria Cattelan ,  Andrea Romano ,  Marco De Donno ,  Aurelio Pianciola

IPC: H01S3/10

CPC classification number: H01S5/141 ,  G02F2203/055 ,  H01S3/105 ,  H01S3/1065 ,  H01S3/1398 ,  H01S5/02216 ,  H01S5/02284 ,  H01S5/0617 ,  H01S5/0622 ,  H01S5/0683 ,  H01S5/101

Abstract: A method of controlling an external-cavity tuneable laser which has a wavelength-elective tuneable mirror, in which wavelength selectivity is achieved by an electrical signal provided by an alternating voltage. The tuneable mirror has a liquid crystal material, a diffraction grating and a planar waveguide optically interacting with the grating. The diffraction grating and the waveguide form a resonant structure that reflects only a selected resonance wavelength from among all the other wavelengths impinging thereon. Depending on the amplitude of the voltage applied to the tunable mirror, the tuneable mirror reflects radiation only at a given wavelength. The lasing output wavelength of the laser is selected to correspond to the resonance wavelength of the tuneable mirror. Accurate selection of the emission wavelength (frequency) of the tuneable laser by the tuneable mirror can be derived from the analysis of the signal modulation induced by the AC voltage applied to the tuneable mirror.

Abstract translation: 一种控制外部可调谐激光器的方法，该激光器具有波长选择性可调谐镜，其中通过由交流电压提供的电信号实现波长选择性。 可调谐镜具有液晶材料，衍射光栅和与光栅光学相互作用的平面波导。 衍射光栅和波导形成谐振结构，其仅从入射到其上的所有其它波长中仅反射选定的谐振波长。 根据施加到可调谐镜的电压的幅度，可调谐镜仅在给定波长处反射辐射。 选择激光器的激光输出波长以对应于可调谐镜的共振波长。 可调谐反射镜对可调谐激光器的发射波长（频率）的精确选择可以从对施加到可调镜的AC电压引起的信号调制的分析中得出。

公开(公告)号：US07917031B2

公开(公告)日：2011-03-29

申请号：US11665466

申请日：2004-10-22

Applicant: Pierpaolo Boffi ,  Lucia Marazzi ,  Paolo Martelli ,  Mario Martinelli ,  Aldo Righetti ,  Rocco Siano

Inventor： Pierpaolo Boffi ,  Lucia Marazzi ,  Paolo Martelli ,  Mario Martinelli ,  Aldo Righetti ,  Rocco Siano

IPC: H04J14/06

CPC classification number: H04J14/06 ,  G02F1/0136 ,  H04J14/02

Abstract: A device and method for stabilizing the polarization of polarization multiplexed optical radiation includes an identified channel which is provided with a pilot signal. The device and method are based on providing to the polarization multiplexed optical radiation a controllable polarization transformation; measuring the optical power of a polarized portion of the identified channel downstream the polarization transformation; controlling, responsively to the optical power, the controllable polarization transformation so that the identified channel downstream the polarization transformation has a predefined polarization azimuth; providing to the optical radiation downstream the polarization transformation a further controllable polarization transformation; measuring the optical power of a polarized portion of the identified channel downstream the further controllable polarization transformation; and controlling, responsively to the optical power, the further controllable polarization transformation so that the identified channel downstream the further controllable polarization transformation has a predefined state of polarization.

Abstract translation: 用于稳定偏振复用光辐射的偏振的装置和方法包括被提供有导频信号的识别信道。 该装置和方法基于向偏振复用光辐射提供可控偏振变换; 测量在所述偏振变换下游的所识别的通道的极化部分的光功率; 响应于光功率控制可控偏振变换，使得偏振变换下游的识别信道具有预定义的偏振方位; 向偏光变换下游的光辐射提供进一步可控的偏振变换; 测量所识别的通道的偏振部分的光功率在下游的可控偏振变换; 并且响应于光功率控制进一步可控的偏振变换，使得在进一步可控偏振变换下游的识别信道具有预定的偏振状态。

公开(公告)号：US07860359B2

公开(公告)日：2010-12-28

申请号：US11629305

申请日：2004-06-21

Applicant: Matteo Cherchi

Inventor： Matteo Cherchi

IPC: G02B6/28

CPC classification number: G02B6/125 ,  G02B6/12007 ,  G02B6/29355 ,  G02B6/2938 ,  G02B2006/12109 ,  G02B2006/12159 ,  H04J14/0226 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252

Abstract: An optical device for splitting/combining a first and a second continuous optical wavelength bands, each wider than 10 nm, has a first, a second, a third, a fourth and a fifth optical splitting devices optically coupled in cascade and a first, a second, a third and a fourth optical differential delay devices optically coupled to, and interleaved between, the optical splitting devices. A suitable choice of the coupling angles of the splitting devices and of the differential delays of the optical differential delay devices gives to the structure flattened passbands and stopbands and makes the optical device tolerant to fluctuations of the structural parameters. An apparatus includes the optical device for use in fiber-to-the-premises networks.

Abstract translation: 用于分割/组合第一和第二连续光波长带的光学装置，每个宽度大于10nm，具有级联光耦合的第一，第二，第三，第四和第五光学分离装置，第一，第二， 第二，第三和第四光差分延迟器件，光学耦合到光分路器件之间并交错在光分路器件之间。 分离装置的耦合角度和光学差分延迟装置的差分延迟的适当选择给予结构平坦的通带和阻带，并使光学装置容忍结构参数的波动。 一种装置包括用于光纤到户内网络的光学装置。

公开(公告)号：US20100040382A1

公开(公告)日：2010-02-18

申请号：US12335991

申请日：2008-12-16

Applicant: Marco Romagnoli ,  Paola Galli

Inventor： Marco Romagnoli ,  Paola Galli

IPC: H04B10/04

CPC classification number: H04B10/5563 ,  G02F2/00 ,  G02F2001/212 ,  G02F2202/20 ,  H04B10/25073 ,  H04B10/504

Abstract: An optical communication system and method of use are described. The system comprises an optical source adapted to receive a digitally encoded data signal comprising sequences of data at a data rate (B) and comprising two signal levels representing a first state and a second state of the data signal, the optical source being adapted to produce an optical signal substantially frequency modulated with frequency excursion Δν comprising a first instantaneous frequency (ν0) associated to the first state and a second instantaneous frequency (ν1) associated to the second state; an optical converter adapted to receive the substantially frequency modulated optical signal, the optical converter having an optical transfer function varying with frequency and including at least one pass band, the at least one pass band having a peak transmittance and at least a low-transmittance region

Abstract translation: 描述了光通信系统和使用方法。 该系统包括适于接收数字编码的数据信号的光源，该数字信号包括数据速率（B）的数据序列，并且包括表示数据信号的第一状态和第二状态的两个信号电平，光源适于产生 基本上频率调制的光信号与频率偏移＆Dgr; 包括与第一状态相关联的第一瞬时频率（＆ngr; 0）和与第二状态相关联的第二瞬时频率（＆ngr; 1） 光转换器，其适于接收基本上频率调制的光信号，所述光转换器具有随着频率变化并且包括至少一个通带的光传递函数，所述至少一个通带具有峰值透射率和至少低透射率区域

公开(公告)号：US08064776B2

公开(公告)日：2011-11-22

申请号：US12335991

申请日：2008-12-16

Applicant: Marco Romagnoli ,  Paola Galli

Inventor： Marco Romagnoli ,  Paola Galli

IPC: H04B10/04

CPC classification number: H04B10/5563 ,  G02F2/00 ,  G02F2001/212 ,  G02F2202/20 ,  H04B10/25073 ,  H04B10/504

Abstract: An optical communication system and method of use are described. The system comprises an optical source adapted to receive a digitally encoded data signal comprising sequences of data at a data rate (B) and comprising two signal levels representing a first state and a second state of the data signal, the optical source being adapted to produce an optical signal substantially frequency modulated with frequency excursion Δν comprising a first instantaneous frequency (ν0) associated to the first state and a second instantaneous frequency (ν1) associated to the second state; an optical converter adapted to receive the substantially frequency modulated optical signal, the optical converter having an optical transfer function varying with frequency and including at least one pass band, the at least one pass band having a peak transmittance and at least a low-transmittance region.

Abstract translation: 描述了光通信系统和使用方法。 该系统包括适于接收数字编码的数据信号的光源，该数字信号包括数据速率（B）的数据序列，并且包括表示数据信号的第一状态和第二状态的两个信号电平，光源适于产生 基本上频率调制的光信号与频率偏移＆Dgr; 包括与第一状态相关联的第一瞬时频率（＆ngr; 0）和与第二状态相关联的第二瞬时频率（＆ngr; 1） 光转换器，其适于接收基本上频率调制的光信号，所述光转换器具有随着频率变化并且包括至少一个通带的光传递函数，所述至少一个通带具有峰值透射率和至少低透射率区域 。

公开(公告)号：US20110080634A1

公开(公告)日：2011-04-07

申请号：US12897456

申请日：2010-10-04

Applicant: Attilio Bragheri ,  Giulia Pietra ,  Raffaele Corsini ,  Danilo Caccioli

Inventor： Attilio Bragheri ,  Giulia Pietra ,  Raffaele Corsini ,  Danilo Caccioli

IPC: H01S3/30

CPC classification number: H01S3/06758 ,  H01S3/0064 ,  H01S3/06754 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/094096 ,  H01S3/0941 ,  H01S3/1695 ,  H01S3/302 ,  H01S2301/02 ,  H04B10/2916 ,  H04B2210/003

Abstract: A Raman amplifier includes at least a first and a second optical Raman-active fiber disposed in series with each other. A first pump source is connected to the first Raman-active fiber, and is adapted for emitting and coupling into the first Raman-active fiber a first pump radiation including a first group of frequencies. A second pump source is connected to the second Raman-active fiber, and is adapted for emitting and coupling into the second Raman-active fiber a second pump radiation including a second group of frequencies. The whole of said first and second group of frequencies extends over a pump frequency range having a width of at least the 40% of the Raman shift. The minimum and the maximum frequency in each of said first and second group of frequencies differ with each other of at most the 70% of said Raman shift.

Abstract translation: 拉曼放大器包括彼此串联布置的至少第一和第二光学拉曼 - 有源光纤。 第一泵浦源连接到第一拉曼有源光纤，并且适于发射和耦合到第一拉曼有源光纤中，该第一泵浦辐射包括第一组频率。 第二泵浦源连接到第二拉曼有源光纤，并且适于发射和耦合到第二拉曼有源光纤中的包括第二组频率的第二泵浦辐射。 所述第一组和第二组频率的整体在具有至少为拉曼位移的40％的宽度的泵频率范围内延伸。 所述第一组和第二组频率中的每一个中的最小和最大频率彼此相差至多为所述拉曼位移的70％。

公开(公告)号：US07909518B2

公开(公告)日：2011-03-22

申请号：US12085323

申请日：2005-12-07

Applicant: Alessio Pirastu

Inventor： Alessio Pirastu

IPC: G02B6/36

CPC classification number: G02B6/4204 ,  G02B6/4234 ,  G02B6/4237

Abstract: An optical assembly includes an optical package having a wall with an aperture and includes a laser device capable of emitting a laser beam through the aperture and a collimator including a sleeve defining a first and a second end, the collimator including a terminating portion of an optical fiber. In addition, the assembly includes a joint element having a first and a second surface, the first surface contacting the wall around the aperture in a first contact area, and the second surface including a convex surface contacting a portion of the surface of the sleeve in correspondence of its first end in a second contact area, the convex surface being at least partially inserted in the sleeve, so that the collimator is aligned with respect to the laser beam.

Abstract translation: 光学组件包括具有孔的光学封装，并且包括能够通过孔发射激光束的激光装置和包括限定第一和第二端的套筒的准直器，准直器包括光学端接部分 纤维。 此外，组件包括具有第一和第二表面的接头元件，第一表面在第一接触区域中接触围绕孔的壁，并且第二表面包括接触套筒表面的一部分的凸面 其第一端部在第二接触区域中的对应关系，凸表面至少部分地插入套筒中，使得准直器相对于激光束对准。