scholarly journals Broadband Fabry–Pérot Resonator From Zerodur for Laser Stabilisation Below 1KHZ Linewidth With < 100 HZ/S Drift and Reduced Sensitivity to Vibrations

2015 ◽  
Vol 52 (3) ◽  
pp. 11-20
Author(s):  
K. Bluss ◽  
A. Atvars ◽  
I. Brice ◽  
J. Alnis
Keyword(s):  
Vacuum Chamber ◽  
Spectral Width ◽  
Allan Deviation ◽  
Beat Note ◽  
Peltier Element ◽  
Fabry Perot ◽  
Lower Temperature ◽  
Stable Signal ◽  
Expansion Temperature ◽  
High Reflectance

Abstract Here we demonstrate the results of creating a two-mirror Fabry-Pérot resonator (FPR) that allows achieving the spectral width of a stabilised laser line below 1 kHz. It had low expansion Zerodur spacer and broadband high reflectance mirrors (99.85% in the range of 630 to 1140 nm). FPR was vertically mid-plane mounted for reduced sensitivity to vibrations and included in two shields inside a vacuum chamber to lower temperature fluctuations. Peltier element was used for temperature stabilisation at zero-expansion temperature. Pound-Drever-Hall (PDH) technique was applied. The signal from FPR was compared to ultra-stable signal (of about 1 Hz linewidth) to form a beat note signal. For the best performance, width of the beat note signal was below 1 kHz with the linear drift of about 23 Hz/s at 780 nm. The Allan deviation showed relative stability of the signal to be about 1 × 10-12.

In-line fiber Fabry-Perot interferometer with high-reflectance internal mirrors

1992 ◽  
Vol 10 (10) ◽  
pp. 1376-1379 ◽  
Author(s):  
C.E. Lee ◽  
W.N. Gibler ◽  
R.A. Atkins ◽  
H.F. Taylor
Keyword(s):  
Fabry Perot ◽  
High Reflectance

In-line Fiber Fabry-Perot Interferometer With High-Reflectance Internal Mirrors

1992 ◽  
Author(s):  
C. E. Lee ◽  
W. N. Gibler ◽  
R. A. Atkins ◽  
H. F. Taylor
Keyword(s):  
Fabry Perot ◽  
High Reflectance

scholarly journals Mechanical feedback cooling assisted by optical cavity cooling of the thermal vibration of a microcantilever

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Y. Kawamura
Keyword(s):  
Optical Cavity ◽  
Optical Power ◽  
Thermal Vibration ◽  
Fabry Perot ◽  
New Type ◽  
Optical Power Density ◽  
Lower Temperature ◽  
Cavity Cooling ◽  
Cryogenic Refrigerator ◽  
Mechanical Feedback

AbstractThis study describes a new two-step process to cool the thermal vibration of microcantilevers. The process combines active mechanical feedback cooling and optical cavity cooling. A micro-Fabry–Perot interferometer, built in-house, is set atop a microcantilever to measure the vibration amplitude, the high optical power density of which induces cavity cooling in the optical cavity. Using a two-step cooling procedure, the equivalent temperature of the thermal vibration of a microcantilever is lowered from room temperature to the theoretical cooling limit of 0.063 K, a much lower temperature than that achieved via simple cavity cooling (18 K), and then by mechanical feedback cooling (0.135 K) obtained for the same type of microcantilevers in previous studies. This experimental demonstration showcases a new type of cooling process of the amplitude of thermal vibration for micro-mechanical resonators to a lower temperature and does not need additional cooling using a conventional cryogenic refrigerator.

In-line fiber Fabry-Perot interferometer with high-reflectance internal mirrors

1991 ◽  
Author(s):  
Chung E. Lee ◽  
William N. Gibler ◽  
Robert A. Atkins ◽  
Henry F. Taylor
Keyword(s):  
Fabry Perot ◽  
High Reflectance

Small quartz mirrors with high reflectance and design of a kind of micro Fabry-Perot interferometer

2005 ◽  
Author(s):  
Hui Ju ◽  
Kenji Sato ◽  
Takayuki Ohta ◽  
Keiichi Nakamula ◽  
Takeaki Hattori ◽  
...  
Keyword(s):  
Fabry Perot ◽  
High Reflectance

scholarly journals Self-Injection Locking of a Distributed Feedback Laser Diode Using a High-Finesse Fabry-Perot Microcavity

2019 ◽  
Vol 9 (21) ◽  
pp. 4616
Author(s):  
Xing Wei ◽  
ZhenDa Xie ◽  
Shi-Ning Zhu
Keyword(s):  
Diode Laser ◽  
Laser Diode ◽  
External Cavity ◽  
Longitudinal Mode ◽  
Injection Locking ◽  
Distributed Feedback ◽  
Beat Note ◽  
Lasing Wavelength ◽  
Fabry Perot ◽  
High Finesse

Optical microcavities have been widely used in nonlinear optics, quantum optics, and laser technologies. Here we demonstrate the self-injection locking of a distributed feedback diode laser using home-made high-finesse Fabry-Perot microcavity. The Fabry-Perot microcavity is fabricated from an x-cut lithium niobate crystal with highly reflective coatings. Frequency pulling effect can be observed for a successful locking, and results in a single-longitudinal mode lasing with narrow linewidth. The lasing wavelength and output power are found robust to the laser-diode current and temperature variations, in comparison to the free-running case. We further characterize the laser linewidth with beat note measurement with a high-performance external cavity diode laser, with beat-note linewidth of 601.85 kHz. This results shows a new method for laser frequency stabilization in a simple setup, and may find applications in telecommunication and spectroscopy.

scholarly journals Suppression of Time Delay Signature in Chaotic Semiconductor Lasers with Filtered Optical Feedback

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Yuan Wu ◽  
Bingjie Wang ◽  
Jianzhong Zhang ◽  
Anbang Wang ◽  
Yuncai Wang
Keyword(s):  
Time Delay ◽  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Laser System ◽  
External Cavity ◽  
Spectral Width ◽  
Laser Frequency ◽  
High Quality ◽  
Chaotic Signals ◽  
Fabry Perot

We report the investigation of the time delay signature in chaotic semiconductor subject to delayed filtered optical feedback, of which a Fabry-Pérot interferometer type of filter is placed in the external cavity. The numerical results show that the suppression of time delay is dependent on the spectral width of the filter and its detuning from the solitary laser frequency. Such laser system will be helpful to acquire high quality chaotic signals.

scholarly journals Development of a fiber optic torque sensor and a single channel, high precision optical strain measurement platform

2021 ◽  
Author(s):  
Nicholas Burgwin
Keyword(s):  
Strain Measurement ◽  
Fiber Optic ◽  
Single Channel ◽  
Optical Measurement ◽  
Spectral Width ◽  
Fiber Optic Sensor ◽  
Torque Sensor ◽  
Interference Immunity ◽  
Fabry Perot ◽  
Optical Strain

Fiber optic sensors based on Fiber Bragg Grating (FBG) technology have been successfully adopted for sensor measurements for almost two decades. The advantages offered by FBG sensors, such as Electro-Magnetic Interference immunity and inherent intrinsic safety, provide motivation for the development of a commercial measurement platform. With the development of an FBG Fabry-Perot cavity, a sensor with sub-picometer spectral width allows for a factor of 1000 times improvement in strain measurement. This thesis presents the development of a highly-accurate optical measurement platform based on the FBG Fabry-Perot cavity and Pound-Drever-Hall (PDH) laser locking technique that is demonstrated through the development of an optical torque sensor. With the fiber optic sensor designed as per the PDH requirements, the platform achieved a measurement accuracy of +/-0.015% of the full-scale torque value of 188N∙m. With the platform at ~$2,000, a successful demonstration of the platform and a fiber optic torque sensor is presented.

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