Fifty years of laser: world and Latvian experience
... Stimulated Emission of Radiation) refers also to light amplifiers not only to light oscillators. As known, every amplifier can be turned in oscillator by appropriate feedback. This presentation is an attempt to give a brief history of laser including operation principles and main applications. Speci ...
... Stimulated Emission of Radiation) refers also to light amplifiers not only to light oscillators. As known, every amplifier can be turned in oscillator by appropriate feedback. This presentation is an attempt to give a brief history of laser including operation principles and main applications. Speci ...
Bourdel-3 (doc, 273 KiB)
... observation time is demanded in order to obtain the best accuracy. This time is limited not only by the expansion speed of the sample (i.e. its temperature, 100 nK corresponds to expansion speed of ~3 m/s for Rubidium 87), but also by the size of the vacuum chamber in which the measurement takes pla ...
... observation time is demanded in order to obtain the best accuracy. This time is limited not only by the expansion speed of the sample (i.e. its temperature, 100 nK corresponds to expansion speed of ~3 m/s for Rubidium 87), but also by the size of the vacuum chamber in which the measurement takes pla ...
Valer Tosa
... zc=7 cm. Here zc represents the distance from the focus to the cell input pinhole. As one can see, the field configuration is rather different in the two cases: a convergent beam induces a flat configuration that persists even after 14 cm of propagation. This is due to the balance between the diverg ...
... zc=7 cm. Here zc represents the distance from the focus to the cell input pinhole. As one can see, the field configuration is rather different in the two cases: a convergent beam induces a flat configuration that persists even after 14 cm of propagation. This is due to the balance between the diverg ...
IEEE Photonics Society - The IEEE French Chapter
... In this talk I will discuss how a Time Domain Travelling Wave approach can be used to simulate the rich multimode dynamics of Quantum Dot Fabry-Perot Lasers. After presenting a short review of the many experimental results concerning the generation of mode locked pulses from single section QWell, QD ...
... In this talk I will discuss how a Time Domain Travelling Wave approach can be used to simulate the rich multimode dynamics of Quantum Dot Fabry-Perot Lasers. After presenting a short review of the many experimental results concerning the generation of mode locked pulses from single section QWell, QD ...
Opto-acoustic Imaging
... conventional techniques can be overcome. Such limitations include contact, frequency range and size constraints of the transducer. Second, the combination of laser and ultrasound necessitates new imaging technologies that may provide information related to both the optical and the acoustical propert ...
... conventional techniques can be overcome. Such limitations include contact, frequency range and size constraints of the transducer. Second, the combination of laser and ultrasound necessitates new imaging technologies that may provide information related to both the optical and the acoustical propert ...
ece477_4_0
... • Lasing is the condition at which light amplification becomes possible by virtue of population inversion. Then, stimulated emission rate into a given EM mode is proportional to the intensity of the optical radiation in that mode. In this case, the loss and gain of the optical field in the optical p ...
... • Lasing is the condition at which light amplification becomes possible by virtue of population inversion. Then, stimulated emission rate into a given EM mode is proportional to the intensity of the optical radiation in that mode. In this case, the loss and gain of the optical field in the optical p ...
Midterm2
... number m due to the insertion? Draw a picture and write an equation for m to get started. (5 marks) ...
... number m due to the insertion? Draw a picture and write an equation for m to get started. (5 marks) ...
Laser risk document
... put into motion with a continuous rotation motor. This motor moves the mirror at very high speeds (20 000 rev. per min., that is 333Hz), which are significantly higher than scanner performances. Following the IEC 60825-1 norms indications related to the determination of the Nominal Ocular Hazard Dis ...
... put into motion with a continuous rotation motor. This motor moves the mirror at very high speeds (20 000 rev. per min., that is 333Hz), which are significantly higher than scanner performances. Following the IEC 60825-1 norms indications related to the determination of the Nominal Ocular Hazard Dis ...
Picosecond-pulse amplification with an external passive optical cavity
... enhancing pulse energies. Long-cavity lasers can provide pulse energies of 90 nJ at repetition rates as low as 4 MHz,4 and cavity dumping allows f lexible control of the pulse repetition rates as high as several megahertz.5 However, in Ti:sapphire systems one can typically boost peak powers by only ...
... enhancing pulse energies. Long-cavity lasers can provide pulse energies of 90 nJ at repetition rates as low as 4 MHz,4 and cavity dumping allows f lexible control of the pulse repetition rates as high as several megahertz.5 However, in Ti:sapphire systems one can typically boost peak powers by only ...
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.