Lasalle, Canada
Lasalle, Canada

Time filter

Source Type

Burgoyne B.,Genia Photonics Inc. | Villeneuve A.,Genia Photonics Inc.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

A rapidly tunable, electronically controlled, pulse duration adjustable, arbitrarily programmable wavelength, picosecond mode-locked fiber laser is presented. The laser is tunable over 80 nm with sweeping frequency over 10 million wavelengths per second. The user can select from a preset linear sweep in either wavelength or optical frequency (kspace) or a custom (user-defined) sweep. Pulse duration is adjustable over tens of picoseconds with nearly Fourier limited linewidth. The laser can be harmonically mode-locked over 1 GHz. The average power is again fully programmable and is at least 50 mW, Watt level is possible with a high power amplifier. The output is a single mode polarization maintaining fiber. The laser possesses several external triggers, such as one trigger per optical pulse, one delayed trigger per optical pulse to synchronize with the experiments, one at the beginning when the laser is ready to sweep to start the data acquisition and one for each consecutive sweep, and finally one trigger for each wavelength change. Such a laser is so versatile that it can be used for medical imaging, material machining and nonlinear optics. It proves also a valuable research tool since all the parameters are adjustable. © 2010 Copyright SPIE - The International Society for Optical Engineering.


Lemire-Renaud S.,Ecole Polytechnique de Montréal | Rivard M.,Ecole Polytechnique de Montréal | Strupler M.,Ecole Polytechnique de Montréal | Strupler M.,University of Montréal | And 7 more authors.
Optics Express | Year: 2010

We present a double-clad fiber coupler (DCFC) for use in endoscopy to reduce speckle contrast, increase signal collection and depth of field. The DCFC is made by fusing and tapering two all silica doubleclad fiber (DCF) and allows achromatic transmission of >95% of core illumination (1265nm - 1325nm) as well as collection of >42% of inner cladding diffuse light. Its potential for endoscopy is demonstrated in a spectrally encoded imaging setup which shows speckle reduction by a factor 5, increased signal collection by a factor 9 and enhanced depth of field by 1.8 times. Separation by the DCFC of single- and multi-mode signals allows combining low-speckle reflectance images (25.5 fps) with interferometrically measured depth profiles (post-processed) for of small three-dimensional (3D) features through an all-fiber low loss instrument. ©2010 Optical Society of America.


Lamouche G.,National Research Council Canada | Vergnole S.,National Research Council Canada | Kim Y.,Genia Photonics Inc. | Burgoyne B.,Genia Photonics Inc. | Villeneuve A.,Genia Photonics Inc.
Progress in Biomedical Optics and Imaging - Proceedings of SPIE | Year: 2011

This paper presents a unique and novel picosecond laser source that offers complete tailoring of the wavelength sweep and that benefits swept-source optical coherence tomography (SS-OCT) applications. Along with the advantages of a fiber-based architecture, the source is a fully programmable, electronically controlled actively mode-locked laser capable of rapidly tuning the wavelength and pulse characteristics. Furthermore, several sweep modes and configurations are available which can be defined by range, with linear sweeps in wavelength or k-space, or by arbitrary wavelengths. The source design is discussed and its use in SS-OCT with a prototype using a semiconductor optical amplifier as a gain medium is illustrated. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).


Gonthier F.,Genia Photonics Inc.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

The availability of fiber combiners has been essential to the wide deployment of robust fiber lasers in the market. Some standard parts have emerged in larger volume, but new designs involving both different processes and different fiber configurations are being proposed to the market, offering novel or improved specifications. We will present some of those new designs involving true signal fiber feed-throughs and better return loss and isolation properties. The new fabrication process also allows more latitude in selecting the number of input pump fibers and is independent of the signal fiber's internal structure. © 2010 Copyright SPIE - The International Society for Optical Engineering.


Begin S.,Laval University | Burgoyne B.,Genia Photonics Inc. | Mercier V.,Genia Photonics Inc. | Villeneuve A.,Genia Photonics Inc. | And 2 more authors.
Biomedical Optics Express | Year: 2011

We present a wavelength-swept coherent anti-Stokes Raman scattering (WS-CARS) spectroscopy system for hyperspectral imaging in thick tissue. We use a strategy where the Raman lines are excited sequentially, circumventing the need for a spectrometer. This fibre laser system, consisting of a pump laser synchronized with a rapidly tunable programmable laser (PL), can access Raman lines over a significant fraction of the high wavenumber region (2700-2950 cm-1) at rates of up to 10,000 spectral points per second. To demonstrate its capabilities, we have acquired WS-CARS spectra of several samples as well as images and hyperspectral images (HSI) of thick tissue both in forward and epi-detection. This instrument should be especially useful in providing local biochemical information with surrounding context supplied by imaging. © 2011 Optical Society of America.


Logan D.F.,King's College | Giguere M.,Genia Photonics Inc. | Villeneuve A.,Genia Photonics Inc. | Helmy A.S.,King's College
Optics Letters | Year: 2013

Phase matching in a multilayer AlGaAs waveguide is used to generate mid-IR (7.5-8.5 μm) light through difference frequency generation (DFG) between a 1550 nm pump and 1950 nm signal. This represents the longest wavelength generated through DFG in a 2D waveguide mode in a semiconductor waveguide. It was produced with an efficiency of 1.2 × 10-4 %/W in a 1 mm long sample. The process is shown to be tunable across >2 μm through appropriate tuning of the input pump and signal wavelengths and/or waveguide geometry, and is therefore a viable platform for monolithic, tunable, mid-IR sources. © 2013 Optical Society of America.


Patent
Genia Photonics Inc. | Date: 2014-10-21

A synchronized laser system for illuminating a sample with first and second laser light pulses, said system comprising: a trigger, said trigger being operative to issue first and second trigger signals, said first and second trigger signals being emitted at an adjustable frequency with a predetermined delay therebetween; a first tunable mode-locked laser operative for emitting said first laser light pulses in response to receiving a train of said first trigger signals, a first wavelength of said first laser light pulses being dependent on said adjustable frequency in accordance with a first wavelength-frequency relationship; a second tunable mode-locked laser operative for emitting said second laser light pulses in response to receiving a train of said second trigger signals, a second wavelength of said second laser light pulses being dependent on said adjustable frequency in accordance with a second wavelength-frequency relationship; wherein said predetermined delay is such that said first and second laser light pulses are emitted so as to arrive substantially simultaneously in said sample; and said first and second wavelength-frequency relationships are selected to result in a predetermined relationship between said first and second wavelengths at each frequency.


Patent
Genia Photonics Inc. | Date: 2013-02-28

The fiber optic assembly can include two fiber optic breadboards hinged to one another along a coinciding hinge axis. Each one of the fiber optic breadboards can have a flat body having two faces and lateral edges, one of which running alongside the hinge axis, and can have a tessellation of tray locations each having a tray attachment. The fiber optic assembly can also include a plurality of fiber optic trays each having a body having a base attachable to at least one of said tray attachments, the body having a size and shape associated to one of a single one of said tray locations and a plurality of adjacent ones of said tray locations on one of said at least one fiber optic breadboards, and having a structure by which an optical fiber having a critical radius of curvature can be confined within at least one optical fiber path.


Patent
Genia Photonics Inc. | Date: 2011-06-03

The fiber optic hinge can mechanically connect a first fiber optic tray and a second fiber optic tray of a fiber optic device, while providing an optical fiber path extending continuously through the first and second hinge members.


Loading Genia Photonics Inc. collaborators
Loading Genia Photonics Inc. collaborators