Vibration Reconstruction and Optical Feedback Parameter Evaluation based on the Direction Discrimination in Self-mixing Interferometry

2021 ◽  
Author(s):  
Chol-Yong Ri ◽  
Jin-Hyok Choe ◽  
Hwa-Ryong Ri ◽  
Chol-Min Pak ◽  
Gyong-Rim Ri ◽  
...  
Keyword(s):  
Optical Feedback ◽  
Feedback Parameter ◽  
Direction Discrimination ◽  
Parameter Evaluation

scholarly journals Measuring the feedback parameter of a semiconductor laser with external optical feedback

2011 ◽  
Vol 19 (10) ◽  
pp. 9582 ◽  
Author(s):  
Yanguang Yu ◽  
Jiangtao Xi ◽  
Joe F. Chicharo
Keyword(s):  
Semiconductor Laser ◽  
Optical Feedback ◽  
Feedback Parameter

Synchronization of Chaotic Quantum Dot Light Emitting Diodes under Optical Feedback Effect

2020 ◽  
pp. 144-148
Keyword(s):  
Quantum Dot ◽  
Delay Time ◽  
Chaos Synchronization ◽  
Optical Feedback ◽  
Light Emitting Diode ◽  
Feedback Effect ◽  
Complete Synchronization ◽  
Light Emitting ◽  
Coupling Methods ◽  
Coupling Parameters

Chaos synchronization of delayed quantum dot light emitting diode has been studied theortetically which are coupled via the unidirectional and bidirectional. at synchronization of chaotic, The dynamics is identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time the system exhibits complete synchronization, . Under proper conditions, the receiver quantum dot light emitting diode can be satisfactorily synchronized with the transmitter quantum dot light emitting diode due to the optical feedback effect.

Absolute pitch ability is not associated with advantage in musical tension processing

2020 ◽  
Author(s):  
Linshu Zhou ◽  
Fang Liu ◽  
Tang Hai ◽  
Jun Jiang ◽  
Dongrui Man ◽  
...  
Keyword(s):  
Detection Threshold ◽  
Absolute Pitch ◽  
Discrimination Threshold ◽  
Pitch Change ◽  
Letter Naming ◽  
Direction Discrimination ◽  
Pitch Direction ◽  
Lower Accuracy ◽  
Tonal Hierarchy ◽  
The Stability

Absolute pitch (AP), a superior ability of pitch letter naming in the absence of a reference note, has long been viewed as an indicator of human musical talent and thus as evidence for the adaptationist hypothesis of music evolution. Little is known, however, whether AP possessors are superior to non-AP possessors in music processing. The present study investigated whether the AP ability facilitates musical tension processing in perceptual and experienced tasks. Twenty-one AP possessors and 21 matched non-AP possessors were tested using novel melodies in C and non-C contexts. Results indicated that the two groups provided comparable ratings of perceived and felt tension for melodies in both contexts. While AP possessors demonstrated lower accuracy with longer reaction time than non-AP possessors in naming movable solfège syllables for pitch in the pretest, their tension rating profiles showed a similar tonal hierarchy as non-AP possessors in regard to the stability of the ending tones of the melodies in both major and minor keys. Correlation analyses suggested that musical tension ratings were not significantly related to performance in pitch letter, movable solfège syllable naming, pitch change detection threshold, or pitch direction discrimination threshold for either group. These findings suggest that pitch naming abilities (either pitch letter or movable solfège syllable naming) do not benefit processing of perceived or felt musical tension, providing evidence to support the hypothesis that AP ability is not associated with advantage in music processing.

Tunable Photonic Microwave Oscillator Self-Locked by Polarization-Rotated Optical Feedback (Preprint)

2013 ◽  
Author(s):  
Nicholas G. Usechak ◽  
Vassilios Kovanis ◽  
T. B. Simpson ◽  
Jia-Ming Liu ◽  
Mohammad AlMulla
Keyword(s):  
Optical Feedback ◽  
Microwave Oscillator

Suppression of Optical Feedback in Laser Diodes Using Multilayered Broad-band Ultra-low Reflective Facets-coating

2020 ◽  
Vol 12 (2) ◽  
pp. 02030-1-02030-5
Author(s):  
Sanjay J. Patel ◽  
◽  
Akshay Jariwala ◽  
C. J. Panchal ◽  
Vipul Kheraj ◽  
...  
Keyword(s):  
Optical Feedback ◽  
Broad Band ◽  
Laser Diodes

Noise characteristics in line-narrowed semiconductor lasers with optical feedback

1981 ◽  
Vol 17 (19) ◽  
pp. 677 ◽  
Author(s):  
L. Goldberg ◽  
A. Dandridge ◽  
R.O. Miles ◽  
T.G. Giallorenzi ◽  
J.F. Weller
Keyword(s):  
Semiconductor Lasers ◽  
Optical Feedback ◽  
Noise Characteristics

Analysis of DFB semiconductor lasers with external optical feedback

1988 ◽  
Vol 24 (9) ◽  
pp. 509 ◽  
Author(s):  
J.L. Beylat ◽  
J. Jacquet
Keyword(s):  
Semiconductor Lasers ◽  
Optical Feedback
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