By Haiyin Sun
This ebook bargains the reader a realistic consultant to the keep watch over and characterization of laser diode beams. Laser diodes are the main primary lasers, accounting for fifty% of the worldwide laser marketplace. right dealing with of laser diode beams is the main to the winning use of laser diodes, and this calls for an in-depth realizing in their specified properties.
Following a quick creation to the operating ideas of laser diodes, the ebook describes the fundamentals of laser diode beams and beam propagation, together with Zemax modeling of a Gaussian beam propagating via a lens. The center of the booklet is worried with laser diode beam manipulations: collimating and focusing, circularization and astigmatism correction, coupling right into a unmarried mode optical fiber, diffractive optics and beam shaping, and manipulation of multi transverse mode beams. the ultimate bankruptcy of the publication covers beam characterization tools, describing the dimension of spatial and spectral homes, together with wavelength and linewidth dimension ideas.
The ebook is a considerably revised and increased model of the name Laser Diode Beam fundamentals, Manipulations and Characterizations by means of a similar writer. New subject matters brought during this quantity contain: laser diode forms and dealing ideas, non-paraxial Gaussian beam, Zemax modeling, numerical research of a laser diode beam, spectral estate characterization equipment, and gear and effort characterization strategies. The publication ways the topic in a pragmatic means with mathematical content material saved to the minimal point required, making the booklet a handy reference for laser diode clients.
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Extra resources for A Practical Guide to Handling Laser Diode Beams
5), no matter what surface we are considering. Zemax calculated the divergence based on the beam parameters we type in. 93329E–002. Again, for a given waist size, wavelength, and M2 factor, there is only one Rayleigh range given by Eq. 4), no matter what surface we are considering. Zemax calculated the Rayleigh range based on the beam parameters we type in. Surface STO Since we put a paraxial lens at surface STO and the waist of the input beam is at the focal plane of the lens, the beam is collimated after it passes through surface STO.
We can see that the Waist at surface IMA is only about 2 μm because it is focusing. If we want to see the beam data at any other location, we can simply insert new surfaces into the Lens Data Editor at these locations. 06901E-002 Fig. 19 Zemax modeling of a Paraxial lens focusing a Gaussian beam. 4 Zemax Modeling of a Gaussian Beam … 51 data and beam data to model other propagations. If a real lens is used, the lens aberration must be well corrected. Strong aberrations will deviate a Gaussian beam from basic mode and the result of modeling such a beam is not accurate.
Therefore, the mixed mode has 10 % larger far ﬁeld divergence than that of the fundamental mode. 2 Focusing a Gaussian Beam Now we consider using the same Paraxial lens to focus a Gaussian beam. 002 to 1. The Rayleigh range of a 1 mm waist size beam is much larger than the 10 mm focal length. The waist of such a beam at the focal plane of the lens means focusing. Then click the Update button at the text box Paraxial Gaussian Beam Data, the text box will look like as shown in Fig. 19. These numbers can be explained in the same way as in Sect.