A Non-Contact Pulse Automatic Positioning Measurement System
... change (time-amplitude) of the signal amplitude on the object surface. To make the data more meaningful, we use a Fast Fourier Transform (FFT) to convert it to “frequency–amplitude” and convert the time domain into the frequency domain to allow us obtain more information about the object surface. 2. ...
... change (time-amplitude) of the signal amplitude on the object surface. To make the data more meaningful, we use a Fast Fourier Transform (FFT) to convert it to “frequency–amplitude” and convert the time domain into the frequency domain to allow us obtain more information about the object surface. 2. ...
Multiwavelength pulse generator using time
... a 0.3% delay of the half-maximum spectral component of a compressed pulse from its ideal location.8 The leading aberration in our setup comes from higher-order phase modulation terms. This distortion is responsible for the sidelobes that are visible in the autocorrelation trace of the compressed pul ...
... a 0.3% delay of the half-maximum spectral component of a compressed pulse from its ideal location.8 The leading aberration in our setup comes from higher-order phase modulation terms. This distortion is responsible for the sidelobes that are visible in the autocorrelation trace of the compressed pul ...
Passive intrinsic-linewidth narrowing of ultraviolet extended-cavity diode laser by weak optical feedback.
... as shown in the following section of this paper. Indeed, for a sufficiently long cavity with a correspondingly long light round-trip time, and thus a short FSR, there will be an increase in noise in the frequency range where we desire low-noise operation of the laser. The behavior of the laser also ...
... as shown in the following section of this paper. Indeed, for a sufficiently long cavity with a correspondingly long light round-trip time, and thus a short FSR, there will be an increase in noise in the frequency range where we desire low-noise operation of the laser. The behavior of the laser also ...
Optics and Quantum Electronics - Research Laboratory of Electronics
... We have found that cavity-enhanced optical parametric chirped pulse amplification (COPCPA) can be used to extend the gain bandwidth of parametric amplifiers while maintaining high conversion efficiency, and has the potential for octave spanning gain at high repetition rate. In C-OPCPA pump light is ...
... We have found that cavity-enhanced optical parametric chirped pulse amplification (COPCPA) can be used to extend the gain bandwidth of parametric amplifiers while maintaining high conversion efficiency, and has the potential for octave spanning gain at high repetition rate. In C-OPCPA pump light is ...
Laser intensity induced transparency in atom
... In order to demonstrate the laser intensity induced transparency, a specific frequency was chosen, at which the PA laser intensity was set to 300 W/cm2, such that the resonant frequency is not influenced by the variation of PA laser intensity. The binding energy of excited molecule for different vib ...
... In order to demonstrate the laser intensity induced transparency, a specific frequency was chosen, at which the PA laser intensity was set to 300 W/cm2, such that the resonant frequency is not influenced by the variation of PA laser intensity. The binding energy of excited molecule for different vib ...
Doppler-Free Saturated Absorption Spectroscopy of Rubidium Using a Tunable Diode Laser
... energy difference between those two energy levels. The decrease in radiation passing through the sample of atoms can then be detected, and an atomic absorption line can be observed on an oscilloscope. Even though atoms can only absorb at specific frequencies, their spectral lines do have some width. ...
... energy difference between those two energy levels. The decrease in radiation passing through the sample of atoms can then be detected, and an atomic absorption line can be observed on an oscilloscope. Even though atoms can only absorb at specific frequencies, their spectral lines do have some width. ...
A Green Laser Pointer Hazard
... US$15 each. These devices were advertised to have output power of 10 mW and had common packaging. One of these lasers had a much weaker green light intensity compared to the others, as judged by normal eyesight. We measured the output power of that laser and found that it emitted more than ten times ...
... US$15 each. These devices were advertised to have output power of 10 mW and had common packaging. One of these lasers had a much weaker green light intensity compared to the others, as judged by normal eyesight. We measured the output power of that laser and found that it emitted more than ten times ...
Get
... the DMD where they were diffracted into multiple orders. By setting the angle of the DMD so that the direction of the incident light was set to ~57° from the DMD surface normal (hence taking advantage of the blaze angle of the grating, which corresponded to the ± 12° mirror angle), 75% of the diffra ...
... the DMD where they were diffracted into multiple orders. By setting the angle of the DMD so that the direction of the incident light was set to ~57° from the DMD surface normal (hence taking advantage of the blaze angle of the grating, which corresponded to the ± 12° mirror angle), 75% of the diffra ...
CHAPTER 1 Wave Nature of Light
... wavelength is called the optical gain lineshape. • For the Doppler broadening, this lineshape turns out to be a Gaussian function. • = 2- 1 ~ 2-5 GHz (for many gas lasers) • ~ 0.02 A for He-Ne laser ...
... wavelength is called the optical gain lineshape. • For the Doppler broadening, this lineshape turns out to be a Gaussian function. • = 2- 1 ~ 2-5 GHz (for many gas lasers) • ~ 0.02 A for He-Ne laser ...
Mode-locking
Mode-locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10−12 s) or femtoseconds (10−15 s).The basis of the technique is to induce a fixed-phase relationship between the longitudinal modes of the laser's resonant cavity. The laser is then said to be 'phase-locked' or 'mode-locked'. Interference between these modes causes the laser light to be produced as a train of pulses. Depending on the properties of the laser, these pulses may be of extremely brief duration, as short as a few femtoseconds.