Tag Archives: diode laser

Science Research Technology

New collimation module for single-mode diode bars utilizes brightness and beam quality

Monolithic micro-optics structured on both sides open up new markets for diode-laser manufacturers.

New collimation module for single-mode diode bars utilizes brightness and beam quality

The new monolithic cylindrical lens array „C-SMDB“ from INGENERIC for single-mode bars.

At the „Photonics West 2018“, INGENERIC for the first time presents the new micro-optics module „C-SMDB“, developed by the company for the collimation of single-mode diode bars. This helps to exploit the improved brightness and open up new fields of application for laser manufacturers.

Single-mode bars can achieve high performances with their large numbers of single emitters. Also, the beam quality from single emitters is superior to that of broad stripe emitters, as each emitter gives off light in fundamental mode. To make best use of these advantages, an optical module needs to collimate the light beam separately for each emitter. The emitters are tightly packed, so it is necessary to use compact micro-optics with the finest structures. The new collimation module optimizes the utilization of the high performance available from single-mode diode bars, and this opens up potential new applications.

The new monolithic cylindrical lens array „C-SMDB“ from INGENERIC for single-mode bars achieves high degrees of collimation as it is produced with the process of precision glass molding. The array is effectively double-sided: The entry side collimates the slow axis, the exit side the fast axis of the emitted light.

The production accuracy of the micro-optics is subject to considerably higher demands than is the case with the optics for diodes with broad stripe emitters. The pitch between the individual lens elements on the slow-axis side, for example, must be maintained with extreme accuracy: For 200 elements, the pitch has to be on average less than 5 nanometers. The center thickness should ideally be in the range of +/- two microns in order to achieve an optimal result.

INGENERIC uses the precision glass molding of the arrays to meet this challenge, a process which the company uses for other micro-optics in its product portfolio. With glass molding, high refractive-index glass very precisely takes on the shape of the pressing tool. The molds manufactured by INGENERIC to sub-micron precision enable the arrays to be produced with exceptionally high accuracy and reproducibility. INGENERIC successfully manufactures arrays with minimal transition zones, highest filling factors and minimal pitch errors, even in large batches.

Dr. Stefan Hambücker, Managing Partner of INGENERIC, sees great potential for diode lasers: „For the single-mode bars, we are currently working to demonstrate their functionality and cost-effectiveness in new fields of application. That is why, in terms of optics, we are working very closely with the manufacturers of diode lasers. With high fill factors, excellent utilization of the surface area, extremely high contour accuracy and a good orientation of the surfaces to one another, the C-SMDB is exactly the right product to make the best use of the brightness.“

The new array has a design wavelength of 970 nm. The effective focal length (EFL) of the fast-axis collimation (FAC) is 600 μm with a numerical aperture of 0.8, the EFL of the slow-axis collimation (SAC) is 190 μm, and the pitch of the SAC is 48 μm. There are 200 lens elements on each part. The result is a back focal length (BFL) of 179 microns.

beamPROP beam shaping optics

INGENERIC is also exhibiting the beamPROP 200 beam-shaping optics, a lens array that adjusts the beam parameter product (BPP) of the fast and slow axis of high-power diode lasers. It is a key component for fiber coupling of diode bars and for dense wavelength multiplexing (DWM).

What is new is that INGENERIC now produces arrays with pitches not only of 500 and 400 μm, but now also with a pitch of 200 μm. This allows the emitters on the bars to be placed closer together and provides an increase in the usable power, which is a necessary step to increase the efficiency in the application. As a result, the beamPROP 200 and the C-SMDB extend the spectrum of diode laser applications.

Christian Wessling, Head of Product Development at INGENERIC, sees the company as a trailblazer for new applications: „With regards to the DWM, which operates with the beamPROP, a number of manufacturers of diode bars continue to work on a comprehensive concept-and optics are a crucial component here. We are working with them step by step to develop this technology. We see ourselves as enablers who are helping to open up new applications.“

INGENERIC at „SPIE Photonics West“
San Francisco/USA, Jan. 27 to Feb. 1, 2018:
Stand 5153

Background information on the industry trend

Diode lasers are characterized by their compact design, high efficiency, long service intervals, and long service life. Although the diode laser is already qualified for numerous applications, the achievable brightness is still subject to the structure of the component as the limiting factor. Also, beam quality today is still not sufficient for some applications, such as material processing.

Manufacturers of diode lasers are endeavoring to develop new fields of application for their products. Primary factors are the brightness and beam quality of the diode lasers. All current developments aim to improve these properties, for example to stabilize the wavelengths during multiplexing (DWM) and thus to combine higher powers with thinner fibers, or to make optimum use of the brightness of single-mode bars. Both approaches require special micro-optics for collimation and beam shaping. However, development work is still required in comparison to the established designs that rely on FAC, SAC, deflecting mirrors and coupling optics to bundle the power into a single fiber. The new micro-optics from INGENERIC have the potential to outperform the brightness of established approaches, which would open up new applications.

About INGENERIC

Founded in 2001 in the university-city of Aachen, Germany, INGENERIC GmbH develops and manufactures high-precision micro-optic components for high-power applications, along with optical and laser systems including fiber couplers, homogenizers and collimation modules for science, medicine and measurement technology.

Today, INGENERIC is one of the few manufacturers in Europe to develop and manufacture glass micro-optics for beam shaping in semiconductor diode lasers according to the individual specifications of its international customers. The company handles the entire process chain from the lens design and the development of prototypes through to the small-batch production and serial manufacture.

INGENERIC also produces high-power laser systems. For the HiLASE or XFEL project, for example, INGENERIC supplied a number of high-energy lasers delivering 10 pulses per second with an energy of 250 Joules and an average power output of 2.5kW.

Company-Contact
INGENERIC GmbH
Christina Ferwer
Dennewartstraße 25-27
52068 Aachen, Germany
Phone: +49.241.963-3951
Fax: +49.241.963-1349
E-Mail: ferwer@ingeneric.com
Url: http://www.ingeneric.com

Press
VIP-Kommunikation
Regina Reinhardt
Dennewartstraße 25-27
52068 Aachen, Germany
Phone: +49.241.89468-24
Fax: +49.241.89468-44
E-Mail: reinhardt@vip-kommunikation.de
Url: http://www.vip-kommunikation.de

Medicine Wellness Health

ELVeS Radial™ laser treatment for varicose veins convinces phlebologists at UIP Conference in Seoul 2015

Unique ELVeS Radial 2ring™ fibers for varicose vein treatment proven as extremely effective on Seoul UIP Chapter Meeting 2015 – more than 800 participants from over 56 countries – clinical studies on quality and safety of the fibers excite expert audience – ELVES Radial 2ring™ and ELVeS Radial slim™ allow for effective and save treatments

Jena, 24. September, 2015 – The unique ELVeS Radial 2ring™ and slim™ fibers by biolitec were in the focus of clinical studies at this year“s UIP Chapter Meeting in Seoul, which took place from 27-29 August. More than 800 guests from over 56 countries attended the presentations of clinical studies in which the ELVeS Radial™ laser therapy for varicose veins was confirmed as an extraordinarily successful and gentle treatment.

Among the renowned speakers was Dr. Uldis Maurins, head of Maurina Vein Clinic in Riga, Latvia, who presented his studies „Technical tips for endovenous laser ablation from the Baltic“, and „Endovenous laser ablations with 1470 nm laser and radial fibers in varicose vein surgery“. In his studies, which can be found in the congress issue „International Angiology – The Journal of Vascular Biology, Medicine, Surgery and Phlebology“, Maurins explains that varicose vein surgeries with ELVeS Radial™ fibers are are extremely effective: With the 2-phase radial emission of energy through the ELVeS® fibers, the energy can be applied homogeneously to the vessel wall. Thus the vein is sealed accurately. The risk of perforating the vein wall is minimized, side effects of typical varicose vein treatments rarely occur. The ELVeS® fiber with an atraumatic fiber tip is inserted into the affected vein through a small puncture. Due to perfect view via ultrasound the fiber can be monitored and placed perfectly well.

In combination with the 1470 nm LEONARDO® laser by biolitec, ELVeS® fibers are the perfect solution for endovenous thermal ablation. The absorption coefficient of water in the vessel wall is higher when using the 1470 nm wavelength than it is with lower wavelengths of 810-1064 nm. Therefore the laser energy can be controlled better in order to avoid thermic irritations of the vessel wall. Dr. Maurins: „The ELVeS Radial™ procedure minimizes any post-operative inflammatory pain and bruising, due to a 40 times greater absorption coefficient in water compared to 810 nm-980 nm lasers targeting hemoglobin. Incompetent veins treated with ELVeS Radial™ showed a 30-40 % reduction in vein diameter one day after the procedure.“

Furthermore Dr. Maurins shows that a treatment with ELVeS 2ring fibers is also possible in the summer since wearing compression stockings may not be necessary.

About biolitec:
biolitec is one of the leading companies worldwide in the field of medical laser treatments and the only provider that possesses all relevant core competencies – photosensitizers, laser devices and optical fibers – in the field of photodynamic therapy (PDT). Besides laser-based treatment of cancer with the drug Foscan®, biolitec primarily researches on minimally-invasive and gentle laser treatments and markets them. ELVeS Radial™ (Endo Laser Vein System) is the most often used laser system worldwide for the treatment of varicose veins. In combination with the Ceralas® HPD laser, the innovative contact fiber XCAVATOR® enables a gentle treatment of e.g. benign prostatic hyperplasia (BPH) in urology. The new LEONARDO® diode laser by biolitec® is the first universally applicable medical laser which features a combination of two wavelengths, 980nm and 1470nm, and is suitable for interdisciplinary use. Gentle laser treatments in the fields of proctology, ENT, gynecology, thoracic surgery as well as pneumology also belong to the business field of biolitec. Further information at www.biolitec.com.

Kontakt
biolitec biomedical technology GmbH
Joern Gleisner
Otto-Schott-Str. 15
07745 Jena
+49 (0) 3641 / 51953-36
+49 (0) 6172 / 27159-69
joern.gleisner@biolitec.com
www.biolitec.com