Category: Broadband Sources

1. OCT Companies in the News

   (7 articles) Exalos

   (5 articles) NKT Photonics

   (3 articles) Multiwave Photonics

   (2 articles) NP Photonics

   (2 articles) Femtolasers

   (2 articles) Thorlabs

   (1 articles) Toptica Photonics

   (1 articles) Praevium Research

   (1 articles) Carl Zeiss Meditec

   (1 articles) Superlum

2. Organizations in the News

   (10 articles) University of Sheffield

   (3 articles) City University of New York

   (3 articles) Cardiff University

   (2 articles) Ecole Polytechnique Fédérale de Lausanne

   (2 articles) Medical University of Vienna

   (2 articles) University of Kent

   (2 articles) National Taiwan University

   (2 articles) University of Waterloo

   (2 articles) Tampere University of Technology

   (1 articles) Ludwig Maximilians Universität München

3. People in the News

   (7 articles) Richard A. Hogg

   (5 articles) Ziyang Zhang

   (4 articles) Alfred Leitenstorfer

   (3 articles) Wei Chang

   (3 articles) Robert R. Alfano

   (3 articles) Adrian G. Podoleanu

   (3 articles) Wolfgang Drexler

   (2 articles) Yu-Ta Wang

   (2 articles) Yung-Hsin Chang

   (2 articles) Ting-Hao Chen

1. Optical fiber and broadband light source

   Explore Article uspto.gov (Aug 31 2010) Patents , Broadband Sources

   An optical fiber and a broadband light source that can generate SC light having a broader bandwidth. A broadband light source 1 is equipped with a seed light source 11 and an optical fiber 12. The seed light source 11 outputs light having a central wavelength in the wavelength range of 1500 nm to 1650 nm. The optical fiber 12 outputs supercontinuum light a result of input of the light output from the seed light source. The optical fiber 12, which has a zero dispersion wavelength in the wavelength range of 1300 nm to 1500 nm and an effective area ...
   

   Comment on Article

2. Device for generating polychromatic light with a continuous spectrum

   Explore Article uspto.gov (Aug 3 2010) Patents , Broadband Sources

   A dedicated polychromatic light generating device including optical pumping devices used to deliver radiation with at least two different excitation wavelengths and a light-guiding device used to deliver polychromatic light at an output when excited by the radiation in a non-linear interaction regime.
   

   Comment on Article

3. High-power, broad-band, superluminescent diode and method of fabricating the same

   Explore Article uspto.gov (Jun 29 2010) Patents , Broadband Sources

   Provided are a superluminescent diode with a high optical power and a broad wavelength band, and a method of fabricating the same. The superluminescent diode includes: at least one high optical confinement factor (HOCF) region; and at least one low optical confinement factor (LOCF) region having a lower optical confinement factor than the HOCF region. The method includes obtaining a difference of optical confinement factors in the HOCF region and the LOCF region through a selective area growth method, the selective area growth method using a deposition thicknesses difference of thin layers according to a width difference of openings that ...
   

   Comment on Article

4. High Power Blue-Violet Superluminescent Light Emitting Diodes with InGaN Quantum Wells

   Explore Article APEX: Applied Physics Express (Jun 2 2010) Broadband Sources

   We report on the characteristics of blue superluminescent light emitting diodes based on the emission of InGaN quantum wells. Narrow ridge-waveguide devices realized by standard processing techniques and with extremely low facet reflectivity show single lateral mode emission and continuous-wave output powers >35 mW with a typical spectral bandwidth of 4–5 nm. Tuning the composition of the active region, superluminescent light emitting diodes spanning all the spectral range between 410 and 445 nm could be realized. The light output is highly directional and results in a coupling efficiency into single mode fibers >50%. The device temperature behavior is also discussed.
   

   Comment on Article Mentions:   Exalos   Ecole Polytechnique Fédérale de Lausanne

5. Nitride superluminescence expands blue–violet wavelength range

   Explore Article semiconductor-today.com (Jun 1 2010) Broadband Sources

   Extended performance for superluminescent light-emitting diodes (SLEDs) based in nitride semiconductor materials is reported by researchers in Switzerland [Marco Rossetti et al, Appl. Phys. Express, vol3, p061002, 2010]. Continuous-wave operation was achieved in the wider wavelength range 410–445nm, expanding on the 420nm of the first such nitride SLED presented by some of the same scientists last year (2009). Half the research group was based at EXALOS, a Swiss company that develops and markets SLED-based modules and systems with wavelengths in the range 650–1650nm. Most of the remainder came from Ecole Polytechnique Fédérale de Lausanne. The Swiss nitride semiconductor epitaxy company ...
   

   Comment on Article Mentions:   Ecole Polytechnique Fédérale de Lausanne   Exalos

6. Rainbow Ti:Sapphire Oscillator

   Explore Article Photonics.com (May 19 2010) Other Business News , Broadband Sources

   Femtolasers Produktions GmbH has unveiled the FemtoSource Rainbow ultrafast Ti:sapphire oscillator with Carrier Envelope Phase (CEP) stabilized short optical pulses and multiple simultaneous outputs centered at 800 and 1030 nm, with 100% mutual synchronization guaranteed. Applications include amplifier/optical phase conjugation power amplifier seeding, coherent terahertz generation, optical coherence tomography, multiphoton microscopy and time-resolved spectroscopy.
   

   Comment on Article Mentions:   Femtolasers

7. Design of highly nonlinear dispersion-flattened square photonic crystal fiber for medical applications

   Explore Article SpringerLink Home (Apr 28 2010) Broadband Sources

   Abstract In this paper, we report the design of a highly nonlinear dispersion flattened high-index-core square photonic crystal fiber (PCF) for applications in optical coherence tomography (OCT). The finite-difference method with an anisotropic perfectly matched boundary layer is used as a numerical simulation tool. A set of optimized design parameters numerically resulted in a nonlinear coefficient of 79.9W−1 km−1 and a dispersion of −0:186 ps/(nm·km) at a wavelength of approximately 1.06 μm. Owing to its high nonlinear coefficient and flattened dispersion, the PCF is expected to be suitable for broadband supercontinuum generation, which is considered very important in OCT medical ...
   

   Comment on Article

8. Polarization-maintaining photonic crystal fibers with near-zero flattened dispersion in 1.06 μm waveband for medical applications

   Explore Article SpringerLink Home (Apr 28 2010) Broadband Sources

   Abstract In this paper we present the design of a modified hexagonal photonic crystal fiber (PCF) having high birefringence and a near-zero flattened dispersion. Using the finite-difference method (FDM), it is shown that the proposed multiple Gedoped core hexagonal PCF exhibits a high birefringence of order 10−3 and a nearly zero flattened dispersion in the optical coherence tomography (OCT) waveband. In addition, the proposed PCF has a confinement loss of less than 10−8 dB/m at 1.06 μm. PCFs with such properties are considered suitable for both endoscopic OCT and other experimental setups employing 1.06 μm lasers.
   

   Comment on Article

9. Thorlabs Introduces Turnkey SLD Source for Imaging Applications

   Explore Article Free Press Release Distribution (Apr 8 2010) Other Business News , Broadband Sources

   Thorlabs, a leading manufacturer of innovative Photonic instruments, is pleased to introduce the S5FC series of Benchtop Superluminescent Diode (SLD) Light Sources. These light sources integrate world class proprietary Indium Phosphide (InP) SLDs manufactured by Covega (now known as Thorlabs Quantum Electronics, TQE) with Thorlabs’ all inclusive benchtop platform. As a result, Thorlabs now offers turnkey broadband SLDs for use in Optical Coherence Tomography (OCT), Imaging Systems, and Fiber Optic Gyroscopes (FOG). Each benchtop is available in 1310 nm and 1550 nm wavelength versions with SM and PM fiber and is equipped with FC/APC bulkhead connectors for easy coupling. Typical ...
   

   Comment on Article Mentions:   Thorlabs

10. Ce3+:YAG double-clad crystal fiber based optical coherence tomography on fish cornea

    Explore Article Optical Coherence Tomography News (Apr 4 2010) Ophthalmology , Broadband Sources

    Feature Of The Week 4/4/10: With the tremendous success of optical coherence tomography (OCT) in recent years, high resolution and high image fidelity are getting more importance. So far, several approaches have been proposed to achieve high axial resolution, such as multiplexed superluminescent diode, femtosecond laser, continuum generation from photonic crystal fiber, and xenon illuminator. In general, these solutions are either have high cost, exhibit bumpy spectrum, or both. In contrast, spontaneous emission light can generate broadband and near-Gaussian spectrum, but the power level is often very weak. Using waveguide to collect the amplified spontaneous emission (ASE) can improve brightness ...
    

    Comment on Article Mentions:   National Taiwan University   Sheng-Lung Huang   Chien-Chung Tsai

11. Ultrawideband photonic crystal fiber coupler for multiband optical imaging system

    Explore Article opticsinfobase.org (Mar 30 2010) Broadband Sources

    We report a photonic crystal fiber (PCF) coupler having an ultrawide spectral bandwidth keeping single mode operation. The use of the PCF coupler in a fiber-based optical coherence tomography (OCT) system enables us to handle the wide spectral bands of various light sources, including superluminescent diodes (SLDs) at 1300 nm and 820 nm, Ti:sapphire lasers, and white-light sources. The multiband imaging performances of the PCF-based OCT system are demonstrated by obtaining dental images at 1300 nm and 820 nm with the same setup. In addition, we show that the PCF coupler could cover the spectrum over a one octave span ...
    

    Comment on Article Mentions:   Zhongping Chen   Byeong Ha Lee   Hae Young Choi

12. Development of laser-based imaging systems for medical diagnostics

    Explore Article SpringerLink Home (Mar 23 2010) Broadband Sources

    We present a laser system with high wavelength flexibility, suitable for nonlinear microscopy and optical coherence tomography, for visualization of disease-related morphological changes in vivo. A single-shot 2D OCT system is demonstrated. Content Type Book ChapterDOI 10.1007/978-3-540-95946-5_329Authors S. Witte, Laser Centre Vrije Universiteit De Boelelaan 1081 1081 HV Amsterdam The NetherlandsM. Salumbides, Laser Centre Vrije Universiteit De Boelelaan 1081 1081 HV Amsterdam The NetherlandsE. J. G. Peterman, Laser Centre Vrije Universiteit De Boelelaan 1081 1081 HV Amsterdam The NetherlandsR. Brakenhoff, Vrije Universiteit Medical Centre Otolaryngology/Head-Neck Surgery De Boelelaan 1117 1081 HV Amsterdam The NetherlandsG. van Dongen, Vrije Universiteit Medical Centre ...
    

    Comment on Article Mentions:   VU University Amsterdam

13. IUSL Holds CUNY Laser Intellectual Property Event April 21

    Explore Article Press Release Submission Services (Mar 17 2010) Broadband Sources

    The supercontinuum, a light having both high spatial coherence and broad spectral bandwidth, was discovered 40 years ago by CUNY Distinguished Professor of Science and Engineering Robert R. Alfano and a colleague at GTE Laboratories. The year 2010 marks the 50th birthday of the laser and 40th year since the discovery of the supercontinuum, a light having both high spatial coherence and broad spectral bandwidth. These anniversaries will be observed at CUNY Laser Intellectual Property Day, an open house event for laser companies and scientists, to be held Wednesday, April 21, by the Institute for Ultrafast Spectroscopy and Lasers (IUSL) ...
    

    Comment on Article Mentions:   Robert R. Alfano   City University of New York

14. Broadband light source in particular for short coherence interferometry

    Explore Article uspto.gov (Mar 16 2010) Patents , Broadband Sources

    The invention relates to an arrangement for generating a broadband spectrum which can be used in particular as a light source for short coherence interferometry. The arrangement comprises a laser, in particular a laser diode, for generating a short light pulse of wavelength .lamda..sub.p and a microstructured optical fiber (1) with a high nonlinearity, which has a zero dispersion of the group velocity in the vicinity of the wavelength .lamda..sub.p and an anomalous dispersion, as well as means for introducing the light pulse into the microstructured optical fiber.
    

    Comment on Article

15. Ce^3+:YAG double-clad crystal-fiber-based optical coherence tomography on fish cornea

    Explore Article opticsinfobase.org (Mar 4 2010) Broadband Sources

    A Ce3+:YAG double-clad crystal fiber (DCF) visible emission was used as the light source for optical coherence tomography (OCT). The visible emission was produced from a 10 μm core DCF pumped by a diode laser. The broadband emission and short central wavelength of this light source enabled the realization of 1.5 μm axial resolution in air. The relatively clean spectrum reduced the side lobe of its point-spread function, and therefore facilitated the generation of a high-quality image with less crosstalk between adjacent image pixels. As a demonstration, an Aplocheilus lineatus goldfish was experimented on to map out the stroma of ...
    

    Comment on Article Mentions:   Dong-Yo Jheng   Kuang-Yu Hsu   Kuang-Yao Huang

1-15 of 93 // 1 2 3 4 5 6 7 »