Nano-Stick Applications

Optical spectroscopy

NOD devices, based on DPH technology, can be used for all traditional types of spectroscopy, like emission, absorption, Raman, Laser Induced Breakdown Spectroscopy (LIBS), and others. The main advantages of NOD spectrometers are:


  • Recordly small size

  • High spectral resolution

  • Robustness

  • Easy customization for required parameters

  • Possibility of combining low and high resolution spectral bands on a single chip

  • Simple realization of any dispersion distribution over spectral channel

  • Mass production by microlithography methods

  • Absence of adjustable components

  • User-friendly software

Optical coherence tomography (OCT)

For this application the most important features and advantages of the NOD devices are:


  • Linear spectral dispersion in the wave vector space

  • Single-mode components

Monitoring of laser wavelength

The NOD miniature spectrometers can be easily embedded into virtually any laser, providing real time wavelength control and tuning if necessary.  Only a very small fraction of laser output needs to be split to an input spectrometer fiber.  The main advantages of NOD spectrometers for this application are:


  • Miniature size

  • Robustness

  • High spectral resolution

  • Possibility of integration into semiconductor laser wafers

Stabilization of laser wavelength

Adding a feedback from a monitoring wavelength spectrometer to a circuit controlling the laser wavelength, the latter can be stabilized with high precision.  It has been experimentally verified by NOD scientists for semiconductor lasers, but can be also applied to other tunable lasers.  The advantages of NOD devices for this application are the same as for laser wavelength monitoring.

Additional DPH technology applications

Coherent and incoherent combining of laser beams
Optical interconnect

Both options were simulated and experimentally tested at NOD, but more research and development is necessary for practical realization.  DPH technology facilitates smooth integration of multiple semiconductor lasers with a beam combiner on a single chip; integration with optical fibers is also feasible.  The main advantages of DPH combiners are:


  • Miniature size

  • High damage threshold

  • Integration readiness

  • Flexibility of design


Photonic Lightwave Circuits (PLC) find more and more applications in various fields from optical communication to quantum computing. Connecting of PLC components and subsystems on a wafer level is a difficult problem, which can be solved by using the DPH technology.  DPH devices can be easily designed for a given system configuration and integrated directly on PLS planar waveguides.  The main advantages are:


  • Flexibility of desigh

  • Integration readiness

  • Miniature size

  • Robustness


Multiple optoelectronic and fiber sensors may benefit from the DPH technology.

Multiplexors and demultiplexors for optical communication

DPH-based mux/demux devices can be easily integrated into WDM and DWDM systems for simultaneous transmission of information at multiple wavelengths.  This application will benefit from:


  • Flexibility of desigh

  • Integration readiness

  • Miniature size

  • Robustness and temperature stability

  • Combining mux/demux and laser wavelength monitoring functionality on the same chip

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All Rights Reserved.

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