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Hitz, Ewing, Hecht. Introduction to laser technology (3ed., IEEE, 2001)(K)(T)(290s)_EO_.djvu |
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Modelocked lasers don't usually have very high peak power...
In optical mixing, two
photons of differing wavelengths are combined into a single photon of shorter
wavelength...
The drawback is that a 2-cm nonlinear crystal can often cost more than
four times as much as a 1-cm crystal...
Obviously, the fun-
fundamental wave stays in phase with itself as it propagates through the crystal...
The first technique, temperature tuning, takes advantage of the tempera-
temperature dependence of some crystals' refractive indices...
Can this light be used to generate a 750-nm signal from
the OPO? What is the idler wavelength in this case?
6...
Four of the arsenic atom's outermost-shell electrons are used to form
bonds with adjacent atoms...
The
electrons and holes combine in the narrow region shown as having thickness
d, and the material there has a higher refractive index than the material above
or below it...
These arrays
offer the possibility of combining the beams from hundreds, or even thou-
thousands, of individual lasers into a single, high-quality, powerful beam...
The vertical di-
divergence is typically tens of degrees, and the horizontal divergence is several
degrees...
CHAPTER
15
SOLID-STATE LASERS
Both semiconductor lasers and the optically pumped lasers discussed in this
chapter, and most of the lasers included in Chapter 19, are solid-state lasers...
Like the very first ruby laser, modern solid-state lasers are usually built
around rods of the ion/host material...
The
spectroscopic laser could also be a diode-pumped laser, perhaps utilizing some
of the techniques discussed in Chapter 10 to reduce its bandwidth...
The strong absorption of 3-|xm
light by tissue makes the Er3+:YAG laser useful in medical applications...
The greater efficiency
of diode pumping, along with lower-voltage operation and the incredibly long
lifetime of diodes, has driven the development of diode pumping during the
past decade...
For an initial characterization of the hardware in a diode-pumped solid-
state laser, we describe a simple side-pumped rod (see Fig...
EDFAs are commercially important because they have enabled the rapid
evolution of fiberoptic telecommunications at the beginning of the twenty-first
Figure 15.5 End-pumped microlaser...
The lamp, of course, creates light traveling in all directions, but the
designer hopes to capture most of the lamp's rays with the reflector...
Some sealed lasers, particularly Ar- and Kr-ion lasers, can be refur-
refurbished by opening the seal, cleaning the interior, replacing the gas, and reseal-
ing the tube...
Helium-Neon, Helium-Cadmium, and Ion Lasers 217
fer from chemically excited oxygen molecules...
The Brewster window reflects
some light polarized perpendicular to the plane of incidence, increasing the
loss in that polarization...
This is small compared to the frequency of the laser's familiar 632.8-nm red
transition D.738 X 1014 Hz), but a thousand times broader than the 1-MHz
bandwidth of one longitudinal mode in a typical resonator...
The only one of much current practical importance is 1,523
nm, which lies in the main band used for high-performance fiberoptic com-
communication systems...
Figure 17.1 shows the three principal vibrational modes of the CO2 mole-
molecule: the symmetric stretching mode, vi; the bending mode, v2; and the asym-
asymmetric stretching mode, v3...
The wave-
waveguide design reduces the diffraction losses that otherwise would occur in a laser
with output aperture a relatively small number of wavelengths across...
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