SLD335YT |
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* Uniform NFP characteristics
* Low operating current
* Maximum power: 4 W
* High optical density (Optical power of 4 W from a 200µm laser beam width) |
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Uniform NFP Characteristics |
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Ultrahigh power laser
diodes are now being used in full-scale practical
applications, and as a result, these individual
applications are beginning to bring up their own
requirements in addition to high optical output
power. In addition to being used as the excitation
light source for solid-state lasers, ultrahigh
power laser diodes are also being used in a wide
variety of manufacturing applications. The range
of these manufacturing applications is increasing:
in addition to welding, cutting, and soldering,
these lasers are being used in application where
a specific property of the material is modified.
These applications include metal hardening, printing,
erasing and initializing optical discs, joining
plastics, and laser plating. The uniform NFP characteristic
discussed here is required by almost all of these
applications. Sony has already established and
refined unique uniform NFP technologies in the
SLD333V and SLD334YT*1, and has now combined
these technologies with their earlier high output
technologies to develop a product that combines
all three elements needed by these applications:
high power, high optical density, and uniform
NFP characteristics. Sony expects that development
of this structure contributes to expansion of
the further application. Following the SLD335YT
of this release, Sony has already started the
next development in this area, knowing that even
more progress must be made on improving NFP characteristics.
Keep your eye on Sony’s ultrahigh power
laser diodes. |
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Low Operating Current |
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The index guide structure
used in the SLD333V and SLD334YT was also adopted
in the SLD335YT so that control of current injection
to the optical emission area and control of the
optical emission area itself are performed efficiently.
This reduces the reactive current and achieves
a low operating current. |
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All-in-One Package that Makes Temperature Control Possible |
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The SLD335YT creates
an optical output of 4 W in a beam width of 200µ
m. A YT package that includes a built-in Peltier
controller was adopted to allow even more precise
control of temperature. Since a power monitor
photodiode is also included, it provides functions
for both power control and temperature control. |
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Uniform NFP and High Optical Density |
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The image created when
a laser diode beam is focused by an optical system
basically reflects the form of the NFP. The SLD335YT
features the highest level of uniform NFP as a
4 W laser diode. Furthermore, it achieves a 4
W output power while providing its output in a
200µm beam width, thus achieving the highest performance
in a device of this class. Thus Sony has achieved
an ultrahigh power laser diode that can irradiate
the highest optical energy (optical output) most
uniformly, when converged by the optical system
due to the combination of these two characteristics.
*1 See CX-NEWS Volume 31. |
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••••
Mr.KITAMURA•••• |
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In the last year, we
developed three uniform NFP ultrahigh power laser
diode products: the 1 W SLD333V, the 2 W SLD334YT,
and now the 4 W SLD335YT. And we have already
started the next development. Although starting
production was extremely difficult, since customer’s
evaluation of the characteristics of these products
has been extremely positive, we are moving up
the manufacturing schedule. We will continue to
press forward with our product development efforts
to respond to the ever stronger demands from our
customers. |
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See all
articles with figures and tables.  |
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Vol.34 |
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