Search

We report the design and simulation performance of a digital push–pull switch based on a wide-angle, asymmetric X-junction that we recently proposed (truncated-structural X-branch). At a full-branching angle of 1.2°, the crosstalk and (straight-port) transmission at the zero-voltage state were -19 and -0.92 dB, respectively. In the switched state, they are -17.45 and -1.06 dB, respectively. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 208–211, 2001. [ABSTRACT FROM AUTHOR]

We report here in detail the WDM performance of a wide-angle novel X-junction switch (TSXB) that we developed earlier. At a full branching angle of 1.5°, our new design achieves a bandwidth of 145 nm (1470–1615 nm) at 1.5 dB over which the crosstalk is kept below -18.0 dB. Maintaining the same order of bandwidth in normal X-junctions (NXB) requires a branching angle as narrow as 0.2°. A TSXB is thus suitable for WDM systems, yet comes in a size significantly more wide angle (and hence more compact) than an NXB. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 28: 423–426, 2001. [ABSTRACT FROM AUTHOR]

We report the theoretical performance of a digital switch based on a wide-angle, low-loss asymmetric X-junction that we recently proposed (“truncated-structural” branch). Even at a wide full-branching angle of 1.2°, the crosstalk and (straight-port) transmission at the zero-voltage state are found to be -17 and -0.5 dB, respectively. In the switched state, they are -20.0 and -1.14 dB, respectively. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 229–233, 2000. [ABSTRACT FROM AUTHOR]

We have proposed a novel asymmetric X-junction, called the truncated-structural X-branch (TSXB), which quadruples the full-branching angle (0.3–1.2°) compared to a conventional junction at -17 dB crosstalk and 75% power transmission to the “straight” port. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 197–200, 1999. [ABSTRACT FROM AUTHOR]

We propose a new class of Y-junctions based on wavefront processing to facilitate phase matching during branching. This is achieved by grading the lateral index profile of the waveguides. Simulations show that, at 85% power transmission, when compared to an all step-profile truncated-structural Y-branch (TSYB) that we proposed earlier, it widens the full branching angle by 1.5°. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 126–129, 1999. [ABSTRACT FROM AUTHOR]