1. Articles from Dongmei Huang

    1-3 of 3
    1. Fourier Domain Mode Locked Laser and Its Applications

      Fourier Domain Mode Locked Laser and Its Applications

      The sweep rate of conventional short-cavity lasers with an intracavity-swept filter is limited by the buildup time of laser signals from spontaneous emissions. The Fourier domain mode-locked (FDML) laser was proposed to overcome the limitations of buildup time by inserting a long fiber delay in the cavity to store the whole swept signal and has attracted much interest in both theoretical and experimental studies. In this review, the theoretical models to understand the dynamics of the FDML laser and the experimental techniques to realize high speed, wide sweep range, long coherence length, high output power and highly stable swept signals ...

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    2. 114 nm broadband all-fiber nonlinear polarization rotation mode locked-laser and time-stretch optical coherence tomography

      114 nm broadband all-fiber nonlinear polarization rotation mode locked-laser and time-stretch optical coherence tomography

      We propose and demonstrate an all-fiber Er-doped mode-locked laser with a 3-dB spectrum of 114 nm by using nonlinear polarization rotation (NPR), which to the best of our knowledge is the first realization to date of such a broad spectrum without any spatial optical devices. The repetition rate and pulse width of the laser are 183.6 MHz and 3.7 ps, respectively. Such an all-fiber NPR mode-locked laser is then applied in time-stretch optical coherence tomography. The axial resolution is 12.1 µm. The all-fiber high speed broadband swept laser based on the time stretching technique has compact structure ...

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    3. 400 MHz ultrafast optical coherence tomography

      400 MHz ultrafast optical coherence tomography

      An ultrafast time-stretched swept source with a sweep rate of 400 MHz is demonstrated based on the buffering of a 100 MHz femtosecond laser pulse train. To the best of our knowledge, this is the highest sweep rate of swept sources for optical coherence tomography (OCT) that has been reported. With a 10 dB sweep range of ∼ 100 nm ∼100nm , an axial resolution of 19 µm is obtained in the OCT. OCT imaging of high-speed rotating disks is demonstrated. A composite complex apodization method is proposed and demonstrated to enhance the signal to noise ratio in the OCT imaging.

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    1-3 of 3
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  2. Topics in the News

    1. (1 articles) Hong Kong Polytechnic University
    2. (1 articles) University of Houston
    3. (1 articles) Harvard University
    4. (1 articles) UC Davis
    5. (1 articles) Massachusetts General Hospital
    6. (1 articles) Vanderbilt University
    7. (1 articles) UT Southwestern Medical Center
    8. (1 articles) Tokyo Medical & Dental University
    9. (1 articles) Oregon Health & Science University
    10. (1 articles) Erasmus University
    11. (1 articles) Visionix
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