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Circular, narrow beam emission of a lens-integrated surface-emitting laser operated at 1.3-mum wavelength was demonstrated. The laser consists of a distributed feedback laser cavity monolithically integrated with an etched 45deg total reflection mirror and an etched InP lens. The profile of the etched InP lens was estimated to be a highly symmetrical parabolic shape that is ideal for the collimation...
We demonstrated a polarization-independent Mach-Zehnder interferometer-type photonic switch with very-low-current of about 5 mA. Furthermore, a few nano-second switching response time was also confirmed which suits for application to optical packet switching.
In this letter, we demonstrated a Mach-Zehnder interferometer-type photonic switch using multimode interference (MMI) couplers with InAlGaAs-InAlAs compound semiconductor materials. A hybrid-waveguide structure with different etching depths was adopted for MMI couplers and other parts of the waveguides for polarization-independent operation. As a result, low-crosstalk switching operation of less than...
We fabricated an InAlGaAs/InAlAs /InP semiconductor photonic switch with a Mach-Zehnder interferometer (MZI) and multi-mode interference (MMI) couplers for low-power consumption operation. As a result, low-current and high-seed switching operation was attained with as low as 3.5 mA and nano-second order experimentally.
An in-situ cleaned and regrown 1.3-/spl mu/m InGaAIAs buried heterostructure laser was fabricated for the first time. The degradation of its driving current was about 1% after a 2000-hour aging test.
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