Tags: deformable mirror, adaptive optics, boston micromachines, UAV, free-space communication, modulating retroreflector, pulse, pulse width, laser beam, CLEO, laser science, biological imaging, deep tissue microscopy, BMC, laser pulse shaping, ultrafast lasers, two photon, optical chopper, optical modulator, chopper, AOM, acousto-optic modulator, speed, shutter
It's been a few weeks since we returned from the Conference on Lasers and Electro-Optics 2013 and now that we're settled back in to the daily routine, I thought I would give some highlights on the show. I was happy to be joined this time by our new Marketing and Communications Specialist, Angelica Perrone, who did a great job navigating the complex photonics market for the first time.
While the conference seems to be chugging along at a nice pace, the tradeshow has most definitely become a smaller venue. We were once again hosted by our strategic partner, Thorlabs (thanks, again guys!) and being in such a central location on the floor, we were able to get a good flavor for the pace of the show. Here are my thoughts:
Little, different, yellow, better
Anybody get that Nuprin reference? Anybody? See what I 'm talking about here.
Okay, so it's not yellow (although yellow lasers are cool), but the show is definitely getting smaller. I mentioned to a colleague that since the show is in San Jose for the second year in the row, it seemed like the barriers on either end of the tradeshow floor had moved in just a bit.
As far as different, the show is not like other photonics shows in that it is pretty focused in its applications. While there were some interesting talks on microscopy, this was a small portion of the material, with most others focussing on more laser-centric applications, as the title of the conference implies.
As far as better, I would say that for BMC, it was most definitely better for our new products: The Reflective Optical Chopper(ROC) and the Linear Array DM. We recieved more interest in these products over our legacy deformable mirror technologies. This is exciting for me as a product marketer and salesperson and even moreso as a member of a company that is always looking for new avenues for our technology. We see the ROC being useful for users who span from pure laser scientists to imaging engineers interested in chopping a beam at high speed with either a constant or variable duty cycle. The linear array has already proven useful in pulse shaping applications as described in our whitepaper, which is available for download here. Both products are available for purchase now.
Our Wavefront Sensorless Adaptive Optics Demonstrator for Beam Shaping (WSAOD-B)also generated some buzz. More and more applications which require wavefront correction are surfacing and need a solution without a wavefront sensor.
In all, it was a good show that has given me and my team work to do as we explore more exotic applications for our technology. I look forward to joining the show again next year and I hope to connect with all of you again in the near future!
For more information on the products mentioned above, please visit our website and download our whitepapers.
Tags: adaptive optics, boston micromachines, product information, response time, free-space communication, modulating retroreflector, pulse, CLEO, BMC, ultrafast lasers, optical chopper, optical modulator, chopper, AOM, acousto-optic modulator, SNR, signal-to-noise, speed, shutter
As Boston Micromachines' newest member, I would first and foremost like to introduce myself. My name is Angelica and I have joined the BMC team as their Marketing and Communications Associate. It has been some time now since our last blog and I thought it would be appropriate to discuss our most recent product; The Reflective Optical Chopper, or ROC.
Optical Choppers, being frequently used for signal recovery in improving signal-to-noise ratio, are used to convert a continuous laser beam into a chopped one. Traditional Optical Choppers offer various pains, such as the need to alter the beam size to fit through wheel spokes, challenging stability at low speeds, the need for costly lock-in amplifier equipment and complex calibration procedures. The innovative, low-cost ROC simply eliminates all of these, outperforming traditional optical choppers.
Drive electronics are paired with BMC’s MEMS Optical Modulator technology to create the ROC. The ROC provides beam chopping at impressive speeds without beam size modification. With a frequency range of DC to 150 kHz with better than 40 µs response time, control increments of .01 Hz and a contrast ratio exceeding 90% up to 100 kHz, the value of the ROC ‘speaks’ for itself. For signal-to-noise ratio improvement, the drive signal can be used as the sync signal, allowing it to be painlessly synchronized.
Many industrial, scientific, medical, aerospace and military applications call for the need of reliable and advanced equipment. The ROC has superior capabilities such as high speed, large frequency range, reliability, stability and usefulness in SNR improvement applications. Basically, the Reflective Optical Chopper is an advance in optical chopping technology which is available at a low price.
In our last blog post (Fast and Precise Laser Pulse Compression with the Linear Array DM) we discussed research being done in the Cui Lab at HHMI’s Janelia Farm Research Campus that used our Linear Array DM for laser pulse compression. In part two we examine a two photon fluorescence microscopy project led by associate Reto Fiolka at Janelia Farm that illustrates the use of the Linear Array’s potential as a pulse compressor for imaging applications using the phase resolved interferometric spectral modulation (PRISM) optimization technique.
The Linear Array pulse compressor setup was used to restore the laser pulse to its transform limited state, thus improving the ability to excite fluorescence by two photon absorption. A sample consisting of 10 micron diameter fluorescence beads (emission: 465 nm) was prepared and spread on a cover-slip. The laser beam first propagated through the pulse compressor and was subsequently focused on the sample using a 20X NA 0.5 Nikon objective. A 2D image was obtained by translating a motorized sample stage. Without spectral pulse shaping, only a weak fluorescence signal could be obtained (See figures a and c). Since the objective adds significant additional dispersion to the laser pulse, the spectral phase correction that had been determined previously using the photodiode could not be used. Therefore PRISM optimization was repeated using the fluorescence signal coming from the beads itself as a feedback signal.
Janelia Farm’s results show a dramatic increase in fluorescence signal for the optimized spectral phase (see figures b and d). The signal strength was increased by a factor of ~6.5
According to Fiolka, “The tested device represents a promising alternative to liquid crystal displays, since the MEMS technology enables high filling factor, high efficiency and operation speed, exceptional phase stability and accuracy and can be used over a very broad wavelength spectrum.”
We're very excited about these results and we are currently working with other groups interested in reproducing these results on tissue samples. Thanks again to Dr. Fiolka and the Janelia Farm group for their efforts in improving two photon imaging techniques!!
More details can be found in our Linear Array white paper which includes an application overview of this exciting project. You can also link to the research directly using the links to the Cui Lab and the scientific publication above.
The SPIE Mirror Technology SBIR/STTR Workshop was held in Rochester, NY this year at the end of July. This is always a good conference for BMC, and we go every year. The conference can best be summarized from their website:
Tech Days annually summarizes the USA Government's investment strategies and activities in developing technology for any application (such as telescopes, imaging systems, seeker/trackers, high-energy laser systems, solar energy, etc.) which requires optical components. Tech Days covers technology investment efforts in: optical materials; substrate design & manufacture; optical fabrication and metrology technology; optical coatings; wavefront sensing and control via adaptive optics; nano-technology imaging technologies; etc.
I highlighted the text for emphasis as to why we attend: You can see why this is a great place for BMC to be. We get to present the latest progress on our NASA SBIRs (of which we have 4 ongoing), see some of the other great research that is going on in the field, and learn from the NASA Program Scientist what the future needs are for mirror technology. Also this year, BMC was a sponsor/exhibitor. This gave us a chance to set up a table displaying some mirrors and information about our products and technology. It was in a great spot at the conference where lunch, coffee breaks and the Tuesday night reception were held. While the conference was not as big as some other SPIE events (e.g. Photonics West and Optics and Photonics), it was a great opportunity to meet with some key people.
A couple of takeaways from the meeting were
(1) NASA SBIR/STTR program is strong and growing.
They are using the research funding they have for strategic programs that will help with technology development, which was called out in the decadal survey as an, if not the, important push for the next ten years.
(2) There is a continuing need for BMC mirror technology.
There are a number of projects that will require the wavefront control that our DMs can provide.
Both of these items point to a rich future for BMC and the deformable mirror industry as a whole. We look forward to connecting with these folks again next year and for many years to come.