Sub-millimeter resolution laser ranging at 9.3 kilometers using temporally stretched frequency chirped pulses from a mode-locked laser

2009 ◽  
Author(s):  
Mohammad Umar Piracha ◽  
Dat Nguyen ◽  
Dimitrios Mandridis ◽  
Tolga Yilmaz ◽  
David Gaudiosi ◽  
...  
Keyword(s):  
Laser Ranging ◽  
Chirped Pulses ◽  
Mode Locked Laser

scholarly journals A Multidimensional Multiplexing Mode-Locked Laser Based on a Dual-Ring Integrative Structure for Tri-Comb Generation

2020 ◽  
Vol 10 (22) ◽  
pp. 8260
Author(s):  
Ruitao Yang ◽  
Hao Sun ◽  
Haisu Lv ◽  
Jian Xu ◽  
Jinxuan Wu ◽  
...  
Keyword(s):  
Operation Mode ◽  
Dispersion Analysis ◽  
Heterodyne Detection ◽  
Laser Ranging ◽  
Pulse Trains ◽  
Wavelength Multiplexing ◽  
Mode Locked Laser ◽  
Comb Generation ◽  
Single Cavity ◽  
Dual Ring

The tri-comb-based multi-heterodyne detection technique has been proven to be a powerful tool for precision metrology, e.g., laser ranging and spectroscopy. However, in existing tri-comb generation methods, it is difficult to provide a large and variable difference in tri-comb repetition rates. In this paper; we propose a multidimensional multiplexing mode-locked laser based on a dual-ring integrative structure. Combining the dimensions of sub-ring multiplexing and wavelength multiplexing, two modes of tri-comb generation can be achieved with the dual-ring single cavity laser. The generated combs are identified based on the relative intensity of the pulse trains and optical spectrum, and the repetition rates of dual-combs from the same sub-ring are distinguished based on dispersion analysis. With repetition rates of approximately 47 MHz and 49.6 MHz, the minimum and maximum repetition rate difference of the generated tri-comb can be changed from 2.38 kHz and 2.59526 MHz to 2.74 kHz and 2.59720 MHz merely by switching the operation mode of the dual-ring integrated mode-locked laser. The obtained results indicate that our method can offer a powerful scheme for future multi-comb generation and its application in multi-heterodyne detection-based laser ranging and spectroscopy.

scholarly journals Simultaneous ranging and velocimetry of fast moving targets using oppositely chirped pulses from a mode-locked laser

2011 ◽  
Vol 19 (12) ◽  
pp. 11213 ◽  
Author(s):  
Mohammad U. Piracha ◽  
Dat Nguyen ◽  
Ibrahim Ozdur ◽  
Peter J Delfyett
Keyword(s):  
Fast Moving ◽  
Moving Targets ◽  
Chirped Pulses ◽  
Mode Locked Laser

Precision laser ranging using extremely chirped pulses from chirped fiber Bragg gratings

2006 ◽  
Author(s):  
Leonard M. Kisimbi ◽  
Kyungbum Kim ◽  
Luis C. Archundia ◽  
Shinwook Lee ◽  
Peter J. Delfyett, Jr.
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Laser Ranging ◽  
Chirped Pulses ◽  
Chirped Fiber Bragg Gratings

Next Generation Laser Voltage Probing

2008 ◽  
Author(s):  
Yin S Ng ◽  
William Lo ◽  
Kenneth Wilsher
Keyword(s):  
Phase Modulation ◽  
Phase Locked Loop ◽  
Next Generation ◽  
Solid Immersion Lens ◽  
User Friendliness ◽  
New Developments ◽  
Polarization Difference ◽  
Previous Generation ◽  
Mode Locked Laser ◽  
Optical Laser

Abstract We present an overview of Ruby, the latest generation of backside optical laser voltage probing (LVP) tools [1, 2]. Carrying over from the previous generation of IDS2700 systems, Ruby is capable of measuring waveforms up to 15GHz at low core voltages 0.500V and below. Several new optical capabilities are incorporated; these include a solid immersion lens (SIL) for improved imaging resolution [3] and a polarization difference probing (PDP) optical platform [4] for phase modulation detection. New developments involve Jitter Mitigation, a scheme that allows measurements of jittery signals from circuits that are internally driven by the IC’s onboard Phase Locked Loop (PLL). Additional timing features include a Hardware Phase-Locked Loop (HWPLL) scheme for improved locking of the LVP’s Mode-Locked Laser (MLL) to the tester clock as well as a clockless scheme to improve the LVP’s usefulness and user friendliness. This paper presents these new capabilities and compares these with those of the previous generation of LVP systems [5, 6].

Chirp waveform control to produce broad harmonic plateau and single attosecond pulse

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hang Liu ◽  
Cui-Yan Xu ◽  
Xiao-Dan Jing ◽  
Yan Qiao ◽  
Li-Qiang Feng
Keyword(s):  
Instantaneous Frequency ◽  
Free Electron ◽  
Fourier Transformation ◽  
Attosecond Pulse ◽  
The Other ◽  
Laser Parameters ◽  
Waveform Control ◽  
Chirped Pulses ◽  
Attosecond Pulses

Abstract Waveform control of three kinds of chirped pulses (i.e. βt, βt 2 and βt 3) to produce harmonic spectra and attosecond pulses has been investigated. It is found that by properly choosing the chirps, the chirp delays and the other laser parameters, not only the instantaneous frequency of some specific half profiles can be decreased, but also its intensity can be increased. As a result, the free electron can receive more energy when it accelerates in these regions, thus leading to the extension of the harmonic cutoff and harmonic plateau. Finally, through the Fourier transformation of the harmonic spectra and by superposing some harmonics, three single attosecond pulses with the durations of 30 as, 33 as and 39 as can be obtained.

Sign in / Sign up

Export Citation Format

Share Document