Cambridge, MA, United States
Cambridge, MA, United States
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A spectroscopy system includes an array of quantum cascade lasers (QCLs) that emits an array of non-coincident laser beams. A lens array coupled to the QCL array substantially collimates the laser beams, which propagate along parallel optical axes towards a sample. The beams remain substantially collimated over the lens arrays working distance, but may diverge when propagating over longer distances. The collimated, parallel beams may be directed to/through the sample, which may be within a sample cell, flow cell, multipass spectroscopic absorption cell, or other suitable holder. Alternatively, the beams may be focused to a point on, near, or within the target using a telescope or other suitable optical element(s). When focused, however, the beams remain non-coincident; they simply intersect at the focal point. The target transmits, reflects, and/or scatters this incident light to a detector, which transduces the detected radiation into an electrical signal representative of the targets absorption or emission spectrum.


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase I | Award Amount: 79.99K | Year: 2015

We envision a coherently coupled QCL array architecture featuring 2nd order DFB gratings to vertically couple out light with excellent beam quality and high output power. This approach does not require cleaving of the devices or facet coatings and is therefore inherently more robust and manufacturable than facet emitters. Additionally, we will implement electronically-controlled tuning elements to allow for fast broadband tuning of the emission wavelength.


Grant
Agency: Department of Homeland Security | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 745.16K | Year: 2012

Eos Photonics, in collaboration with the group of Prof. Loncar at Harvard University, proposes to further develop a novel widely tunable, high power quantum cascade laser source for remote sensing applications. Eos will then transition this revolutionary mid-IR laser into a commercial product that is ideally suited for the standoff detection and identification of threats such as explosives and chemical warfare agents. The tuning mechanism of our source is fully electronic and uses no moving parts, relying instead on the integration of intersubband tuning elements fabricated monolithically with DBR gratings to ensure electrically-controlled wavelength tuning over a wide wavelength range and with excellent mode suppression ratio.


Grant
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase II | Award Amount: 628.66K | Year: 2016

To achieve the goals of this program improving spectral coverage and output power of monolithic QCL sources - we propose to develop in collaboration with MIT Lincoln Laboratory a broadly tunable high power source that is based on Eos proprietary QCL array technology. The current generation of Eos commercially available fully packaged QCLAs (The Matchbox) can be tuned over a wavelength range of up to 200 cm-1. The development of the proposed next generation QCLA source with increased power level and spectral breadth will strongly benefit from Eoss unique expertise and experience in design and fabrication of monolithic QCL sources.


Grant
Agency: Department of Defense | Branch: Navy | Program: STTR | Phase: Phase II | Award Amount: 741.52K | Year: 2013

The team consisting of Eos Photonics Inc. and MIT Lincoln Laboratories will develop a MWIR laser source based on a high power, continuous wave (CW) Quantum Cascade Laser (QCL) array. The output from the array elements will be beam combined monolithically using a unique spectral beam combining technique. The combined outputs will reach power levels exceeding 25 Watts with excellent beam quality (M2


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 179.81K | Year: 2013

The broadly tunable laser source developed during this program is a ground-breaking solution that requires a single quantum cascade laser device monolithically integrated with a power amplifier to cover the entire wavelength range from 4.18 to 5.11 microns with an output power greater than 500 mW. The broadly tunable QCL source proposed will have capabilities useful for a number of military and commercial applications ranging from infrared countermeasure to laser-based sensors.


Grant
Agency: Department of Defense | Branch: Navy | Program: STTR | Phase: Phase I | Award Amount: 79.82K | Year: 2013

We envision a coherently coupled QCL array architecture featuring 2nd order DFB gratings to vertically couple out light with excellent beam quality and high output power. This approach does not require cleaving of the devices or facet coatings and is therefore inherently more robust and manufacturable than facet emitters.


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase I | Award Amount: 149.27K | Year: 2014

The objective of the present program is to develop a lambda ~ 4.6 microns source based on a stack of QCL bars with unprecedented power level exceeding 100 Watts while maintaining good beam quality. The solution proposed needs to be (1) compatible with beam combining solutions and (2) scalable to the kilowatt level. Eos Photonics proposes to leverage its experience building, cooling and packaging 1-D QCL array, in order to assemble several such bars into a 2D stack. Detailed mechanical and thermal modeling will be required to properly size the different components. Keeping in mind the constraints posed by the very large thermal load, Eos will find materials, and mounting procedures minimizing the mechanical stress on the laser array and also minimizing SMILE. Eos will also investigate potential failure mechanisms and find mitigating solutions. All design parameters as well as their expected deviations (from mounting error, thermal effects or mechanical stress) will be evaluated in the context of the beam combining solution identified to maintain an excellent beam quality.


Patent
EOS Photonics, Inc. and Massachusetts Institute of Technology | Date: 2013-07-25

Photonic integrated circuits (PICs) are based on quantum cascade (QC) structures. In embodiment methods and corresponding devices, a QC layer in a wave confinement region of an integrated multi-layer semiconductor structure capable of producing optical gain is depleted of free charge carriers to create a low-loss optical wave confinement region in a portion of the structure. Ion implantation may be used to create energetically deep trap levels to trap free charge carriers. Other embodiments include modifying a region of a passive, depleted QC structure to produce an active region capable of optical gain. Gain or loss may also be modified by partially depleting or enhancing free charge carrier density. QC lasers and amplifiers may be integrated monolithically with each other or with passive waveguides and other passive devices in a self-aligned manner. Embodiments overcome challenges of high cost, complex fabrication, and coupling loss involved with material re-growth methods.


Grant
Agency: Department of Defense | Branch: Army | Program: STTR | Phase: Phase I | Award Amount: 149.63K | Year: 2014

To achieve the goals of this program improving spectral coverage and output power of monolithic QCL sources as well as the development of a production and manufacturing plan - we propose to develop in collaboration with MIT Lincoln Laboratory a broadly tunable high power source that is based on Eos"proprietary QCL array technology. The current generation of Eos"commercially available fully packaged QCLAs ("The Matchbox") can be tuned over a wavelength range of up to 200 cm-1. The development of the proposed next generation QCLA source with increased power level and spectral breadth will strongly benefit from Eos"s unique expertise and experience in design and fabrication of monolithic QCL sources.

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