By Haiyin Sun
This ebook bargains the reader a pragmatic advisor to the keep an eye on and characterization of laser diode beams. Laser diodes are the main known lasers, accounting for fifty% of the worldwide laser industry. right dealing with of laser diode beams is the major to the profitable use of laser diodes, and this calls for an in-depth figuring out in their special properties.
Following a brief creation to the operating ideas of laser diodes, the publication describes the fundamentals of laser diode beams and beam propagation, together with Zemax modeling of a Gaussian beam propagating via a lens. The middle of the publication is anxious 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 ebook covers beam characterization equipment, describing the size of spatial and spectral homes, together with wavelength and linewidth size suggestions.
The e-book is a considerably revised and extended model of the identify Laser Diode Beam fundamentals, Manipulations and Characterizations through an analogous writer. New issues brought during this quantity comprise: laser diode kinds and dealing rules, non-paraxial Gaussian beam, Zemax modeling, numerical research of a laser diode beam, spectral estate characterization tools, and gear and effort characterization options. The booklet methods the topic in a realistic manner with mathematical content material stored to the minimal point required, making the publication a handy reference for laser diode clients.
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Additional resources for A Practical Guide to Handling Laser Diode Beams
Laser diode beams are skew (elliptical) Gaussian beams. But here we only model a paraxial (circular) Gaussian beam for simplicity. After we have mastered the modeling process, we can model the skew Gaussian beam feature without difﬁculties. Click the Paraxial Gaussian beam button, a text box Paraxial Gaussian Beam Data appears, we will look at it later. Click the Settings button at the top of the text box, a table box Paraxial Gaussian Beam Settings appears. Then we can type in the parameters of the laser diode beam.
There are many different combinations of active layer widths and stack layers. 4 shows the schematic of a four-layer laser diode stack. There are many TE modes in the beam. The power of a laser diode stack can be up to thousands of watts. A laser diode stack can be treated 32 2 Laser Diode Beam Basics Fig. 4 Schematic of a laser diode stack Fast axis Slow axis a b Multi TE mode output beam Laser diode stack as a rectangular shaped light source of size a × b as shown in Fig. 4. The beams of laser diode stacks are not like the laser beams we often see, but are rather like the lights from a flashlight.
We select Surface 2 as the STP surface and place an ideal Paraxial lens with 10 mm focal length at the STO surface. We type in 10 in the Surface 1 Thickness box, Surface 1 is then 10 mm away from the STO surface and is at the focal plane of the lens. Type in 10 in the surface STO Thickness box, which means surface IMA is 10 mm away from surface STO and is at another focal plane of the lens. After typing in these data, the Lens Data Editor box will look like as shown in Fig. 15. Then we need to set the parameters for the Gaussian beam to be modeled.