The following revision has been made in Optics (section 42)

N - new (red);  M - modified (blue)--- [2001 text for modified codes in green]; D - deleted (purple).
 

42.50.-p     Quantum optics (for lasers, see 42.55 and 42.60; see also 42.65 Nonlinear optics; 03.65 quantum  mechanics)

42.50.Ar     Photon statistics and coherence theory

42.50.Ct     Quantum description of interaction of light and matter; related experiments

M 42.50.Dv  Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements (see also 03.65.Ud Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.) --- [Original text:  Nonclassical field states; squeezed, antibunched, and sub-Poissonian states; operational definitions of the phase of the field; phase measurements]

M 42.50.Fx  Cooperative phenomena in quantum optical systems --- [Original text:  Cooperative phenomena; superradiance and superfluorescence]

M 42.50.Gy  Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption --- [Original text:  Effects of atomic coherence on propagation, absorption, and amplification of light]

42.50.Hz     Strong-field excitation of optical transitions in quantum systems; multi-photon processes; dynamic Stark shift (for multiphoton ionization and excitation of atoms and molecules, see 32.80.Rn, and 33.80.Rm, respectively)

42.50.Lc     Quantum fluctuations, quantum noise, and quantum jumps.

42.50.Md     Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency

... ... ...         Dynamics of nonlinear optical systems; optical instabilities, optical chaos, and optical spatio-temporal  dynamics, see 42.65.Sf

... ... ...         Optical solitons; nonlinear guided waves, see 42.65.Tg

N 42.50.Nn  Quantum optical phenomena in absorbing, dispersive and conducting media

N 42.50.Pq  Cavity quantum electrodynamics; micromasers

N 42.50.St  Nonclassical interferometry, subwavelength lithography

42.50.Vk    Mechanical effects of light on atoms, molecules, electrons, and ions (see also 32.80.Pj and 33.80.Ps Optical cooling and trapping of atoms and molecules, respectively)

... ... ...    Optical tests of fundamental laws and forces, see 12.20.Fv Experimental tests in quantum electrodynamics and 03.65.Ta Foundations of quantum mechanics; measurement theory

N 42.50.Xa  Optical tests of quantum theory
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42.55.-f     Lasers

42.55.Ah General laser theory

42.55.Ks Chemical lasers (for chemiluminescence, see 78.60.Ps)

42.55.Lt   Gas lasers including excimer and metal-vapor lasers

42.55.Mv  Dye lasers

42.55.Px   Semiconductor lasers; laser diodes

42.55.Rz   Doped-insulator lasers and other solid state lasers

42.55.Sa   Microcavity and microdisk lasers

N 42.55.Tv  Photonic crystal lasers and coherent effects

42.55.Vc    X- and gamma-ray lasers

42.55.Wd Fiber lasers

42.55.Xi Diode-pumped lasers

42.55.Ye Raman lasers (see also 42.65.Dr Stimulated Raman scattering; CARS)

N  42.55.Zz   Random lasers

... ... ... Free-electron lasers, see 41.60.Cr
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42.62.-b      Laser applications

42.62.Be       Biological and medical applications (see also 87.50.Hj, 87.54.Fj, 87.63.Lk, and 87.80.Cc in biological and medical physics)

42.62.Cf        Industrial applications

M 42.62.Eh  Metrological applications; optical frequency synthesizers for precision spectroscopy (see also 06.20 Metrology, and 06.30  Measurements common to several branches of physics and astronomy) --- [Original text:  Metrological applications (see also 06.20 Metrology, and 06.30 Measurements common to several branches of physics and astronomy)]

42.62.Fi Laser spectroscopy
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42.65.-k Nonlinear optics

42.65.An    Optical susceptibility, hyperpolarizability (see also 33.15.Mt Electric and magnetic moments, polarizability and magnetic susceptibility of molecules)

M 42.65.Dr    Stimulated Raman scattering; CARS [Original text:  same]  (for Raman lasers, see 42.55.Ye)

42.65.Es     Stimulated Brillouin and Rayleigh scattering

M 42.65.Hw  Phase conjugation; photorefractive and Kerr effects --- [Original text:  Phase conjugation, optical mixing, and photorefractive effect]
 

M 42.65.Jx   Beam trapping, self-focusing and defocusing; self-phase modulation --- [Original text:  Beam trapping, self-focusing, and thermal blooming]

M 42.65.Ky  Frequency conversion; harmonic generation, including high-order harmonic generation (see also 42.79.Nv Optical frequency converters) --- [Original text:  Harmonic generation, frequency conversion (see also 42.79.Nv optical frequency converters)]

N 42.65.Lm  Parametric down conversion and production of entangled photons (see also 42.50.Dv Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements; for optical parametric oscillators and amplifiers, see 42.65.Yj)

M 42.65.Pc  Optical bistability, multistability, and switching, including local field effects (see also 42.60.Gd  Q-switching; 42.79.Ta Optical computers, logic elements, interconnects, switches; neural networks) --- [Original text:  Optical bistability, multistability, and switching (see also 42.60.Gd Q-switching; 42.79.Ta Optical computers, logic elements, interconnects, switches; neural networks)]
 

42.65.Re Ultrafast processes; optical pulse generation and pulse compression

42.65.Sf Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics

42.65.Tg Optical solitons; nonlinear guided waves (for solitons in fibers, see 42.81.Dp)

42.65.Wi Nonlinear waveguides

M 42.65.Yj  Optical parametric oscillators and amplifiers [Original text: same](see also 42.65.Lm Parametric down conversion and production of entangled photons)
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M  42.68.-w   Atmospheric and ocean optics --- [Original text:  Atmospheric optics]

42.68.Ay       Propagation, transmission, attenuation, and radiative transfer (see also 92.60.Ta Interaction of atmosphere with electromagnetic waves; propagation)

42.68.Bz       Atmospheric turbulence effects (see also 92.60.Ek Convection, turbulence, and diffusion)

42.68.Ca       Spectral absorption by atmospheric gases (see also 94.10.Gb Absorption and scattering of radiation)

M  42.68.Ge   Effects of clouds and water; ice crystal phenomena (see also 92.60.Jq Water in the atmosphere; 92.60.Nv Cloud physics) --- [Original text:  Effects of clouds and water (see also 92.60.Jq Water in the atmosphere; 92.60.Nv Cloud physics)]

42.68.Jg       Effects of aerosols (see also 92.60.Mt Particles and aerosols)

42.68.Kh       Effects of air pollution (see also 92.60.Sz Air quality and air pollution)

42.68.Mj       Scattering, polarization (see also 94.10.Gb Absorption and scattering of radiation)

42.68.Sq       Image transmission and formation

42.68.Wt       Remote sensing; LIDAR and adaptive systems

N  42.68.Xy      Ocean optics (see also 92.10.Pt Optical properties of sea water in physics of the oceans)
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42.81.-i      Fiber optics

... ... ...       Fiber-optic instruments, see 07.60.Vg

42.81.Bm   Fabrication, cladding, and splicing

42.81.Cn   Fiber testing and measurement of fiber parameters

42.81.Dp   Propagation, scattering, and losses; solitons

42.81.Gs   Birefringence, polarization

42.81.Ht   Gradient-index (GRIN) fiber devices

42.81.Pa   Sensors, gyros

42.81.Qb   Fiber waveguides, couplers, and arrays

N  42.81.Uv    Fiber networks (see also 42.79.Sz Optical communication systems, multiplexers, and demultiplexers)

42.81.Wg   Other fiber-optical devices (for fiber lasers, see 42.55.Wd)
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M  42.88.+h   Environmental and radiation effects on optical elements, devices, and systems --- [Original text: Radiation effects on optical elements, devices, and systems]
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