公开(公告)号：US08289521B2

公开(公告)日：2012-10-16

申请号：US13027873

申请日：2011-02-15

Applicant: Stephane Blin ,  Michel J. F. Digonnet ,  Gordon S. Kino ,  Seth Lloyd

Inventor： Stephane Blin ,  Michel J. F. Digonnet ,  Gordon S. Kino ,  Seth Lloyd

IPC: G01C19/72

CPC classification number: G01C19/721

Abstract: A fiber-optic sensor includes an optical fiber coil and a laser source optically coupled to the coil. Light from the source is transmitted to the coil as a first optical signal and a second optical signal counter-propagating through the coil. The optical paths of the first optical signal and the second optical signal are substantially reciprocal with one another and the first optical signal and the second optical signal are combined together after counter-propagating through the coil to generate a third optical signal. The laser source is frequency-modulated or can have a coherence length longer than a length of the coil.

Abstract translation: 光纤传感器包括光纤线圈和光耦合到线圈的激光源。 来自光源的光作为第一光信号传输到线圈，第二光信号通过线圈反向传播。 第一光信号和第二光信号的光路基本上互相倒数，并且第一光信号和第二光信号在通过线圈反向传播之后被组合在一起，以产生第三光信号。 激光源被调频，或者可以具有比线圈长度更长的相干长度。

公开(公告)号：US20090195785A1

公开(公告)日：2009-08-06

申请号：US12271760

申请日：2008-11-14

Applicant: Stephane Blin ,  Michel J.F. Digonnet ,  Gordon S. Kino

Inventor： Stephane Blin ,  Michel J.F. Digonnet ,  Gordon S. Kino

IPC: G01C19/72

CPC classification number: G01C19/721

Abstract: A fiber-optic sensor includes an optical fiber coil and a laser source optically coupled to the coil. Light from the source is transmitted to the coil as a first signal propagating along the coil in a first direction and a second signal propagating along the coil in a second direction opposite to the first direction. The optical paths of the first signal and the second signal are substantially reciprocal with one another and the first signal and the second signal are combined together after propagating through the coil to generate a third signal. The laser source is frequency-modulated or can have a coherence length longer than a length of the coil.

Abstract translation: 光纤传感器包括光纤线圈和光耦合到线圈的激光源。 来自源极的光作为沿着线圈沿第一方向传播的第一信号被传输到线圈，而第二信号沿着与第一方向相反的第二方向沿着线圈传播。 第一信号和第二信号的光路基本上彼此相互倒数，并且第一信号和第二信号在传播通过线圈之后组合在一起以产生第三信号。 激光源被调频，或者可以具有比线圈长度更长的相干长度。

公开(公告)号：US20080030741A1

公开(公告)日：2008-02-07

申请号：US11770660

申请日：2007-06-28

Applicant: Michel Digonnet ,  Hyang Kim ,  Stephane Blin ,  Vinayak Dangui ,  Gordon Kino

Inventor： Michel Digonnet ,  Hyang Kim ,  Stephane Blin ,  Vinayak Dangui ,  Gordon Kino

IPC: G01B9/02

CPC classification number: G01D5/3538 ,  G01C19/721 ,  G01D5/35322 ,  G02B6/02328

Abstract: An optical sensor includes a directional coupler comprising at least a first port, a second port, and a third port. The first port is in optical communication with the second port and with the third port such that a first optical signal received by the first port is split into a second optical signal that propagates to the second port and a third optical signal that propagates to the third port. The optical sensor further includes a photonic bandgap fiber having a hollow core and an inner cladding generally surrounding the core. The photonic bandgap fiber is in optical communication with the second port and with the third port. The second optical signal and the third optical signal counterpropagate through the photonic bandgap fiber and return to the third port and the second port, respectively. The photonic bandgap fiber has a phase thermal constant S less than 8 parts-per-million per degree Celsius.

Abstract translation: 光学传感器包括至少包括第一端口，第二端口和第三端口的定向耦合器。 第一端口与第二端口和第三端口光通信，使得由第一端口接收的第一光信号被分裂成传播到第二端口的第二光信号和传播到第三端口的第三光信号 港口。 光学传感器还包括具有中空芯和通常围绕芯的内包层的光子带隙光纤。 光子带隙光纤与第二端口和第三端口光通信。 第二光信号和第三光信号通过光子带隙光纤反向传播并分别返回到第三端口和第二端口。 光子带隙光纤的相位热常数S小于每摄氏摄氏度百万分之八。

公开(公告)号：US20060159135A1

公开(公告)日：2006-07-20

申请号：US11318060

申请日：2005-12-23

Applicant: Jean-Francois Cliche ,  Michel Tetu ,  Francois Baribeau ,  Stephane Blin ,  Martin Guy

Inventor： Jean-Francois Cliche ,  Michel Tetu ,  Francois Baribeau ,  Stephane Blin ,  Martin Guy

IPC: H01S3/10 ,  H01S3/13 ,  H01S3/00

CPC classification number: H01S5/042 ,  H01S5/0654 ,  H01S5/0687

Abstract: There is provided a narrow linewidth semiconductor laser device comprising a semiconductor laser and a low noise current source operatively connected to the laser for supplying current thereto, the current source being particularly adapted to prevent a significant degradation of the frequency noise spectrum of the laser. The laser device also has an optical frequency discriminator providing an error signal representative of the optical frequency of the laser. The laser device also has control means having a feedback network for providing a frequency feedback signal. The feedback network is particularly adapted to the frequency noise spectrum of the frequency discriminator, the frequency noise spectrum of the laser and the tuning response of the laser. The control means is also provided with sequencing means for allowing to automatically enable frequency locking of the laser on the frequency reference of the optical frequency discriminator. The laser device is provided with an enclosure for enclosing the frequency discriminator to isolate the frequency discriminator from external perturbations. Such an arrangement is particularly advantageous since it allows to provide an improved sub-kHz linewidth and a high coherence while being compact, lightweight and highly reliable. Moreover, the narrow linewidth semiconductor laser device of the present invention can advantageously be automatically operated.

Abstract translation: 提供了窄线宽半导体激光器件，其包括半导体激光器和可操作地连接到激光器的用于提供电流的低噪声电流源，该电流源特别适于防止激光器的频率噪声谱的显着劣化。 激光装置还具有提供表示激光器的光频率的误差信号的光学鉴频器。 激光装置还具有控制装置，其具有用于提供频率反馈信号的反馈网络。 反馈网络特别适用于频率鉴频器的频率噪声谱，激光器的频率噪声谱和激光器的调谐响应。 控制装置还具有排序装置，用于允许在光学鉴频器的频率参考上自动启用激光器的频率锁定。 激光装置设置有用于封闭鉴频器以将鉴频器与外部扰动隔离的外壳。 这样的布置是特别有利的，因为它允许提供改进的sub-kHz线宽和高相干性，同时紧凑，重量轻且高度可靠。 此外，本发明的窄线宽半导体激光器件可以有利地被自动操作。