optical pumping institute

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Optical Training Institute - Continuing Education & Exam Prep

For 25 years, Optical Training Institute has provided ABO-NCLE approved continuing education courses and exam prep courses for Opticians.

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Optical Pumping - an overview | ScienceDirect Topics

The technique named " optical pumping " consists of absorbing pump light in order to excite erbium ions and provide population inversion in a given energy band. As seen in Figure 4.1, optical pumping may efficiently be performed around λ=0.98 μm from the fundamental ground state level 4 I 15/2 into the 4 I 11/2 level. Optical pumping may also be performed in the short-wavelength band of ...

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Optical pumping - Wikipedia

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Frequency-dependent optical pumping in atomic Lambda …

October 1, 2001 / Vol. 26, No. 19 / OPTICS LETTERS 1507 Frequency-dependent optical pumping in atomic L-systems J. Kitching* Time and Frequency Division, M.S. 847.10, National Institute of …

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SECTION 5: OPTICAL AMPLIFIERS

10-20 mW of absorbed pump power at these wavelengths can produce 30-40 dB of amplifier gain. Pump Efficiencies of 11 dB/mW achieved at 980 nm. Pumping can also be performed at 820 and 670 nm with GaAlAs laser diodes. Pump efficiencies are lower but these lasers can be made with high output power. 6

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Optical Pumping - Definition and Applications

Optical pumping is a process in which light energy is used to excite electrons from a lower to higher energy level. It was first developed by Alfred Kastler in the early 1950s and is primarily ...

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Excitation cross section of erbium in semiconductor ...

mined in the case of optical excitation of erbium in semicon-ductor matrix under band-to-band optical pumping. Accord-ing to experimental data the erbium excitation cross section in crystalline silicon is by several orders of magnitude higher than that for direct absorption of photons in the dielectric SiO2 and Al2O3 matrices. 2,3

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Introduction to Optical Amplifiers

Optical Pump Figure 4. A fiber Raman optical ampflier. A fiber Raman amplifier is pictured in Figure 4. The gain medium is undoped optical fiber. Power is transferred to the optical signal by a nonlinear optical process known as the Raman effect. Power to supply the optical gain is supplied by an optical pump. The wavelengths that

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Hybrid Electro-Optical Pumping of Active Plasmonic ...

Here, we study, for the first time, hybrid electro-optical pumping of active plasmonic waveguide structures, and by using comprehensive self-consistent numerical simulations, demonstrate that this hybrid approach can outperform both pure electrical pumping and pure optical pumping. The SPP modal gain is higher than under pure optical pumping ...

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Optical Pumping - Massachusetts Institute of Technology

Feb 17, 2011· A. Kastler discovered optical pumping in the 1950's and received the Nobel Prize for his work in 1966. In this experiment you will explore the phenomenon of op-tical pumping and its application to fundamental mea-surements in atomic and nuclear physics with equipment originally built for the Junior Lab shortly after the pub-

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Optical Pumping | TeachSpin

Optical Pumping is a widely used and powerful technique for exploring atomic energy states, atomic transitions, and atomic collisions using electromagnetism in the form of light, radio frequency, and uniform constant magnetic fields. TeachSpin's Optical Pumping apparatus explores the atomic physics of both isotopes of natural rubidium.

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Gain switching of a double-core-waveguide semiconductor ...

Mar 14, 2020· Gain switching of a double-core-waveguide semiconductor laser via traveling-wave optical pumping Hidekazu Nakamae 1,2*, Takahiro Nakamura, Takashi Ito, Toshimitsu Mochizuki 1,2, Changsu Kim, Shaoqiang Chen 1,2, Masahiro Yoshita, and Hidefumi Akiyama1,2 1Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan 2JST-CREST, c/o Institute for …

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Long-lived charge separation following pump-wavelength ...

Van der Waals heterostructures consisting of graphene and transition metal dichalcogenides have shown great promise for optoelectronic applications. However, an in-depth understanding of the critical processes for device operation, namely, interfacial charge transfer (CT) and recombination, has so far remained elusive. Here, we investigate these processes in graphene-WS2 heterostructures by ...

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Chapter 7 Lasers - Massachusetts Institute of Technology

By optical pumping with an intense lamp (flash lamp) or another laser one can pump a significant fraction of the atoms from the ground state with population N0 into the excited state N3 both for the three level laser operating according to scheme shown in figure 297 (a) or N4 in the case. 298 CHAPTER 7. ...

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Improved Optical Amplification Efficiency by Using Turbo ...

Therefore, in this paper, a pump recycling technology including a spatial pump splitting device was newly developed so that the remaining pump light can be re-injected into the MC-EDF. As a result, the remaining pump light can be used without waste and an improvement in the optical amplification efficiency of the cladding pumping can be realized.

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M.I.T. Junior Lab 8.13/ 8.14 - Massachusetts Institute of ...

R. Benumof, "Optical Pumping Theory and Experiment", American Journal of Physics, 33, pp.151-160, (1965) M. Nagel and F. E. Haworth, "Advanced Laboratory Experiments on Optical Pumping of Rubidium Atoms-Part I: Magnetic Resonance", American Journal of Physics, 34, pp.553-558, (1966)

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Site specific Eu3+ stimulated emission in GaN host

optical pumping He–Cd laser, 325 nm show the same peak at 620.6 nm as the surface emission obtained with high peak power pumping N 2 laser . Since the PL emission obtained with above band gap GaN:Eu excitation is generally consid-ered to be due to the majority of Eu3+ ions which are located on Ga sites, the results shown in Fig. 1 point to ...

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Enantio-conversion of chiral mixtures via optical pumping

Feb 25, 2021· Enantio-conversion of chiral mixtures via optical pumping Chong Ye, Bo Liu, Yu-Yuan Chen, and Yong Li Phys. Rev. A 103, 022830 – Published 25 February 2021

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Optical pumping by a laser pulse traveling in a cavity

Optical pumping by a laser pulse traveling in a cavity Takuya Majima,1 Akira Terasaki,2 and Tamotsu Kondow2 1East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan 2Cluster Research Laboratory, Toyota Technological Institute in East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan

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Concept of EDFA ( Erbium-doped Optical Fiber Amplifier ...

Jun 23, 2020· The pumping laser, the energy source of EDFA, provides energy to amplify the optical signal. Generally, it is a semiconductor laser with an output wavelength of 980nm or 1480nm. While passing through the EDF, the pumping light pumps erbium ions from low levels to high levels. Thus the antonyms of the population are formed.

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World's First Ultrafast All-Optical Room Temperature ...

May 24, 2019· Ultrafast all-optical switching. Sub-picosecond switching times were achieved thanks to the combination of ultrafast exciton relaxation dynamics, inherent to organic semiconductors, and the sub-picosecond cavity lifetime of our device. In our setup, the pump beam formed the address state that was gated by the control beam.

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Optical-pumping magnetometer | instrument | Britannica

Other articles where Optical-pumping magnetometer is discussed: Earth exploration: Magnetic methods: …are made with proton-precession or optical-pumping magnetometers, which are appreciably more accurate. The proton magnetometer measures a radio-frequency voltage induced in a coil by the reorientation (precession) of magnetically polarized protons in a container of ordinary water.

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High Sensitivity Optically Pumped Quantum Magnetometer

May 26, 2013· Quantum magnetometers based on optical pumping can achieve sensitivity as high as what SQUID-based devices can attain. In this paper, we discuss the principle of operation and the optimal design of an optically pumped quantum magnetometer. The ultimate intrinsic sensitivity is calculated showing that optimal performance of the magnetometer is attained with an optical pump power of …

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Reynolds Crossing - ia Eye Institute

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Optical Pumping: Three- and Four-Level Systems

Optical Pumping: Three- and Four-Level Systems Excerpt from Field Guide to Lasers In a simple two-level system, it is not possible to obtain a population inversion with optical pumping because the system can absorb pump light (i.e., gain energy) only as long as population inversion, and thus light amplification, is not achieved.

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IA EYE INSTITUTE - 36 Reviews - Optometrists - 402 ...

36 reviews of ia Eye Institute "OPTICAL DEPT ONLY. It is always a rough time when you lose a pair of glasses. VEI made it super easy to get a new (and more modern) pair of glasses. The staff was very kind and patient with me and they were great about assisting me with finding a better pair of glasses than I had before. The only problem I did have was when it came time to pick up my glasses.

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Optical Pumping - University of British Columbia

California Institute of Technology Physics 77 Optical Pumping Eric D. Black September 27, 2004 Sometimes you want to magnetize a gas, to align all of the little mag-netic moments of the gas atoms in the same direction. You might plan to have somebody inhale the polarized gas, then look at …

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An optical-frequency synthesizer using integrated photonics

dispersion engineering creates dispersive-wave peaks in optical power that appear at 999 nm and 2,190 nm, owing to the zero-integrated GVD starting from the pump wavelength. With a radius of 23 µm, the threshold for octave-spanning spectra is brought to below 50 mW of on-chip pump power24, at the expense of a f rep,THz of 1.014 THz that cannot

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