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We have demonstrated a simple and reliable method for fabricating high-Q WGM (Whispering Gallery Mode) optical microcavities in “mid-IR relevant” ZBLAN glasses. Intrinsic quality factors of 107 have already been demonstrated.
We present our recent development of fiber-optic technology for all-optical switching and routing of entangled photons at high speeds, with minimal loss and added in-band noise, and—most importantly—without disturbing the photons' quantum state.
Tunable intracavity phase modulation is applied to an all normal dispersion fiber oscillator to suppress wave-breaking and increase the pulse energy. Spectral broadening beyond 1200–2000nm is achieved by 15-m-long high nonlinear fiber.
We demonstrate a dual-wavelength, carbon nanotube mode-locked Er fiber laser. The laser outputs two wavelengths at 1549nm and 1562nm, and each wavelength corresponds to pulse duration of ∼1.3ps and repetition rate of ∼11.27MHz.
The required equalizer complexity for GI-MMF (graded index multi-mode fiber) transmitting 15 spatial modes is numerically calculated with different bend radius in 112 Gb/s DP-QPSK transmission.
We experimentally demonstrate the add/drop multiplexer for two orbital angular momentum (OAM) modes carrying 100-Gbit/s RZ-QPSK channels. An OSNR penalty of < 1.6 dB for added and dropped channels is observed.
We present measurements and theoretical work demonstrating the drastic reduction of polarization instability driven noise, improving the stability of polarized supercontinuum generated in all normal dispersion highly nonlinear fiber
Axial strain-induced effects on beating frequency from a short cavity PM-EDF based distributed Bragg reflector (DBR) laser was investigated and experimentally demonstrated for the first time. A linear strain sensitivity of 0.640 GHz/mε was obtained.
A magnetic-field sensor implemented on a polymeric microstructured optical fiber infiltrated using ferrofluid is presented. The fiber sensor is operating in transmission mode, measuring magnetic fields up to 1250Gauss, revealing high polarization sensitivity.
A Sagnac interferometer based temperature sensor is proposed by using a piece of selectively filled polarization maintaining photonic crystal fiber. The sensitivity dependence on the infiltration length ratio was studied for the first time.
The previously demonstrated inherent temperature compensation of an interferometric fiber-optic current sensor is extended to the cases of large Faraday phase shifts and strong bend-induced birefringence in the sensing fiber.
We review the technique of spectral beam combining and discuss detailed limitations in the laser systems used for combination of multiple cw and pulsed fiber amplifiers to kW average power and mJ's of pulse energy.
A diode pumped CW Erbium (Er)-doped Zr-Ba-La-Al-Na (ZBLAN) fluoride glass fiber laser operating at 2.78 µm was demonstrated using a guided mode resonance filter (GMRF) as an external cavity mirror.
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