September 2022
| לשנה טובה מכל הלב לוח שנה מיד שרה-איי אל פוטוניקס |
Links to Topics
Coffee – Quiz with Prize and Discount
Featured Company (Abet Technologies)
❂Lasers
| MDL-III-xxx-SM series diode lasers from CNI Optoelectronics Tech(CNI) are specially designed for single-mode fiber (include PM), coupled with high power stability <0.5% and long term stability. These lasers are ideal for application in measurement, communication, spectrum analysis, and many other fields. Each laser has a single wavelength from 405 to 1683 nm. Output power varies from 1 to 100 mW, depending upon the device’s wavelength. |
Microfluidic channel surface roughness might be a concern in direct femtosecond laser ablation, normally yielding an RMS value in the range of a few µm. One solution to improve this value is using the fs bi-burst regime. An article, entitled “Fabrication of Microfluidic Tesla Valve Employing Femtosecond Bursts,” shows how fs-burst mode ablation can be optimized to achieve sub-µm surface roughness in glass channel fabrication. This process is done without compromising on manufacturing throughput! PHAROS laser from Light Conversion was part of the experimental setup for this article. |
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| Extreme ultraviolet lithography (EUVL) systems use a 30-kW, short pulse CO2 laser focused on a 30 µm liquid tin droplet, repeatedly 50,000 times per second, to produce 250 W of EUV light at a 13.5 nm wavelength. The EUV light is then collected, shaped, and guided by the world’s most precise mirrors onto a silicon wafer for subsequent etching or deposition. This enables a throughput of about 100 silicon wafers per hour, with about 600 Apple A15 (iPhone 13) chips on each wafer. Each chip contains 15 billion transistors, based on the 5-nm technology node. For more than twenty years, Access Laser has provided research and industry with application-specific CO2 laser solutions for cutting-edge experiments and products. |
Laser Focus World (LFW) Innovators Awards 2022 has announced HARPIA-TG transient grating spectrometer and PHAROS-UP femtosecond laser among the best innovations of the year by gold and silver medals, respectively. The honorees were selected by an esteemed and experienced panel of judges from the optics and photonics community. The HARPIA-TG transient grating spectrometer enables carrier diffusion coefficient and carrier lifetime measurements. It is based on a laser-induced transient grating technique. Thus, it is completely optical and does not require contact bonding or additional doping. Accordingly, the device has a high potential in the semiconductor market. In general, PHAROS femtosecond lasers combine multi-millijoule pulse energy and high average power. PHAROS features a mechanical and optical design optimized for both scientific and industrial applications. A compact, thermally stabilized, and sealed design enables the integration of PHAROS into various optical setups and machining workstations. |
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| Several pulse compression techniques, such as hollow-core fibers, multi-pass cells, and multi-plates have been successfully applied to compress the 1030 nm output of Light Conversion laser sources. Recently, researchers have implemented four-level cascaded focus and compression (CASCADE) to achieve a 50-fold compression of millijoule-level pulses from 157 to 3.1 femtoseconds. Moreover, these single-cycle pulses were applied to drive the high harmonic generation, providing isolated attosecond pulses. The experimental setup starts with one CEP-stabilized Yb-KGW PHAROS laser from Light Conversion, delivering 1.34-mJ pulses at a central wavelength of 1030 nm and at a repetition rate of 4 kHz. The pulse duration was 157 fs, which corresponds to an input peak power of 8.5 GW. Read more about this research in their article entitled, “Nonlinear compression toward high-energy single-cycle pulses by cascaded focus and compression.” |
Laser viewing cards and ceramic viewers from CNI Optoelectronics Tech convert ultraviolet and infrared (UV/IR) radiation to visible radiation, thus providing a visual image of light. The cards consist of an UV/IR phosphor material that stores the energy from conventional light sources (e.g. indoor room lighting, sunlight). As the incident radiation in non-visible wavelengths stimulates the phosphor, the stored energy is released as visible light. Hand-held viewers are ideal for observation and alignment of laser beams with wavelengths between 250 nm and 13 µm. The viewing card delivers a bright, high-contrast image with edge-to-edge sharpness. |
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❂Optics
| New to IL Photonics KM innovation, located in South Korea, has appointed IL Photonics as its Israeli agent. KM innovation is one of the leading manufacturers of laser-grade CVD-ZnSe material:
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Sputter-coated thin-film interference filters deliver exemplary performance in many biological applications, but can also be used to enhance performance in automation applications. Filters for wavelengths from the UV to SWIR boost contrast, enabling an imaging system to acquire more information faster and at lower overall system cost. How can Chroma Technology’s sputtered filters improve your system? Read this article to find out. |
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| Now available at a discount from IL Photonics (due to a customer surplus):
A) 180 degree beam deviation: 6 arc sec B) 180 degree beam deviation: 8 arc sec For more information or a quotation, contact Moshe. |
In Chroma Technology’s webinar entitled, “Multispectral SWIR Analysis: Choosing the right solution and appropriate filters,” John covers such topics as:
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| Broadband Diffusers (BDs) are an optimal solution for the homogenization of low to medium power laser beams with high efficiency, low cost at high volumes, and as can be inferred from their name, suitability for polychromatic use. A BD is an unordered micro-lens array with added randomized functions that modify the sag and curvature of the micro-lens array, which homogenizes a non-uniform laser beam to have a more uniform and homogenized intensity profile. Compared to an ordered micro-lens array, a BD has no order artifacts and thus provides better uniformity. Some common applications of broadband diffusers are:
For more information, contact Holo/Or. |
When signal light is very precious, any background light that reaches the detector of an optical system can greatly compromise signal-to-noise ratio. If the signal is low, then the background must be maintained at an even lower level, and so background light must be minimized. For instance, in a Raman analytical system only one in a million photons will be Raman scattered, so each must be captured and analyzed from among the 999,999 non-Raman scattered photons. In such applications, extremely high levels of blocking are necessary outside of the signal band of interest. This can lead to the proposition of using more than one blocking filter. To read an article about this technique, click here. Iridian Spectral Technologies is a diversified optical filter manufacturer that is an international leader in filter design and manufacture, especially for application in the fields of fiber optic communications, biomedical optical spectroscopy, 3D entertainment, and aerospace. |
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