scholarly journals Quantum enhanced measurement of an optical frequency comb

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Y. Cai ◽  
J. Roslund ◽  
V. Thiel ◽  
C. Fabre ◽  
N. Treps
Keyword(s):  
Frequency Comb ◽  
Parameters Estimation ◽  
Optical Frequency Comb ◽  
Quantum Limit ◽  
Optical Frequency ◽  
Single Shot ◽  
Spectral Parameters ◽  
Detection Scheme ◽  
Standard Quantum ◽  
Standard Quantum Limit

AbstractMeasuring the spectral properties of an optical frequency comb is among the most fundamental tasks of precision metrology. In contrast to general single-parameter measurement schemes, we demonstrate here single shot multi-parameter estimation of an optical frequency comb at and beyond the standard quantum limit. The mean energy and the central frequency as well as the spectral bandwidth of ultrafast pulses are simultaneously determined with a multi-pixel spectrally resolved (MPSR) apparatus, without changing the photonics architecture. Moreover, using a quantum frequency comb that intrinsically consists of multiple squeezed states in a family of Hermite–Gaussian spectral/temporal modes, the signal-to-noise ratios of the multiple spectral parameters estimation can surpass the standard quantum limit. Combining our multi-pixel detection scheme and the multimode entangled resource could find applications in ultrafast quantum metrology and multimode quantum information processing.

scholarly journals Squeezed-light-driven force detection with an optomechanical cavity in a Mach–Zehnder interferometer

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Chang-Woo Lee ◽  
Jae Hoon Lee ◽  
Hyojun Seok
Keyword(s):  
Zehnder Interferometer ◽  
Vacuum Field ◽  
Quantum Limit ◽  
Measurement Sensitivity ◽  
Force Detection ◽  
Detection Scheme ◽  
Standard Quantum ◽  
Standard Quantum Limit ◽  
Optomechanical Cavity ◽  
Mach Zehnder Interferometer

Abstract We analyze the performance of a force detector based on balanced measurements with a Mach–Zehnder interferometer incorporating a standard optomechanical cavity. The system is driven by a coherent superposition of coherent light and squeezed vacuum field, providing quantum correlation along with optical coherence in order to enhance the measurement sensitivity beyond the standard quantum limit. We analytically find the optimal measurement strength, squeezing direction, and squeezing strength at which the symmetrized power spectral density for the measurement noise is minimized below the standard quantum limit. This force detection scheme based on a balanced Mach–Zehnder interferometer provides better sensitivity compared to that based on balanced homodyne detection with a local oscillator in the low frequency regime.

scholarly journals Single-shot discrimination of coherent states beyond the standard quantum limit

2021 ◽  
Author(s):  
Guillaume Thekkadath ◽  
Santiago Sempere-Llagostera ◽  
Bryn Bell ◽  
Raj Patel ◽  
Myungshik Kim ◽  
...  
Keyword(s):  
Coherent States ◽  
Quantum Limit ◽  
Single Shot ◽  
Standard Quantum ◽  
Standard Quantum Limit

scholarly journals Real-time frequency-encoded spatiotemporal focusing through scattering media using a programmable 2D ultrafine optical frequency comb

2020 ◽  
Vol 6 (8) ◽  
pp. eaay1192 ◽  
Author(s):  
Xiaoming Wei ◽  
Yuecheng Shen ◽  
Joseph C. Jing ◽  
Ashton S. Hemphill ◽  
Changsheng Yang ◽  
...  
Keyword(s):  
Real Time ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Single Shot ◽  
Scattering Media ◽  
Wave Source ◽  
Time Frequency ◽  
Temporal Focusing ◽  
Wavefront Shaping

Optical wavefront shaping is a powerful tool for controlling photons in strongly scattering media. Its speed, however, has been the bottleneck for in vivo applications. Moreover, unlike spatial focusing, temporal focusing from a continuous-wave source has rarely been exploited yet is highly desired for nonlinear photonics. Here, we present a novel real-time frequency-encoded spatiotemporal (FEST) focusing technology. FEST focusing uses a novel programmable two-dimensional optical frequency comb with an ultrafine linewidth to perform single-shot wavefront measurements, with a fast single-pixel detector. This technique enables simultaneous spatial and temporal focusing at microsecond scales through thick dynamic scattering media. This technology also enabled us to discover the large-scale temporal shift, a new phenomenon that, with the conventional spatial memory effect, establishes a space-time duality. FEST focusing opens a new avenue for high-speed wavefront shaping in the field of photonics.

scholarly journals Analysis and filtering of phase noise in an optical frequency comb at the quantum limit to improve timing measurements

2014 ◽  
Vol 39 (12) ◽  
pp. 3603 ◽  
Author(s):  
Roman Schmeissner ◽  
Valerian Thiel ◽  
Clément Jacquard ◽  
Claude Fabre ◽  
Nicolas Treps
Keyword(s):  
Phase Noise ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Quantum Limit ◽  
Optical Frequency

Dispersion spectroscopy with optical frequency comb-based single-shot dual-heterodyne mixing

2019 ◽  
Vol 58 (33) ◽  
pp. 9044 ◽  
Author(s):  
Sultana Nasrin ◽  
Hiroaki Tada ◽  
Leona Yuda ◽  
Tatsutoshi Shioda
Keyword(s):  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Single Shot ◽  
Heterodyne Mixing
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