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Journals and Conferences
A technique is demonstrated for polarization demultiplexing of arbitrary complex-modulated signals. The technique is based entirely on the observation of samples in Stokes space, does not involve demodulation and is modulation format independent. The data in Stokes space is used to find the best fit plane and the normal to it which contains the origin. This… (More)
We present a new design for an all-fiber-optic gyroscope that makes use of a single-mode coil containing a Lyot depolarizer along with a partial depolarizer placed between the polarizer and the loop coupler. This design provides an optimal trade-off between the suppression of polarization errors and the reduction of drift errors arising from external… (More)
We present a model for coherent optical spectrum analysis that relates the key parameters of frequency resolution, power uncertainty, and sweep speed. The theoretical model is compared with experimental results obtained from spectral measurements of an external-cavity laser.
A novel technique is proposed for measurement of the group delay (GD) and the differential group delay (DGD) of optical material, components, and fiber. This new method is based on continuous polarization modulation of the stimulus optical field as opposed to sequential polarization state switching used in the traditional phase shift method. A new complete… (More)
We designed, fabricated, and characterized an integrated chip-scale wavemeter based on an unbalanced Mach-Zehnder interferometer with 300 MHz free spectral range. The wavemeter is realized in the Si<sub>3</sub>N<sub>4</sub> platform, allowing for low loss with ∼62 cm of on-chip delay. We also integrated an optical hybrid to provide phase information. The… (More)
Application of Kalman filtering with a novel nearest-symbol constraint enables dynamic tracking of carrier phase and polarization state. Thereby, the proposed Kalman filter accomplishes demodulation of optical polarization-multiplexed complex modulation format signals.
Methods of geometric optics are used to characterize a multimode optical fiber. The discrete propagation modes are derived by applying the phase resonance constraint to equations of constant phase surfaces. This constraint provides a very clear geometrical interpretation of discrete propagation modes, and provides a link between the well known Wentzel,… (More)
A new technique for measuring the insertion loss and the polarization-dependent loss (PDL) of optical components is proposed. The technique is based on continuous polarization modulation of the stimulus optical field as opposed to sequential polarization state switching as in the traditional Jones matrix analysis or Mueller matrix methods. This new method… (More)