Monolithically integrated semiconductor optical amplifier and electroabsorption modulator with dual-waveguide spot-size converter input and output

Abstract

We have demonstrated an electroabsorption modulator and semiconductor optical amplifier monolithically integrated with novel dual-waveguide spot-size converters (SSC) at the input and output ports for low-loss coupling to a planar light-guide circuit silica waveguide or cleaved single-mode optical fibre. The device was fabricated by means of selective-area MOVPE growth, quantum well intermixing and asymmetric twin waveguide technologies with only a three-step low-pressure MOVPE growth. For the device structure, in the SOA/EAM section, a double ridge structure was employed to reduce the EAM capacitances and enable high bit-rate operation. In the SSC sections, buried ridge structure (BRS) was incorporated. Such a combination of ridge, ATG and BRS structure is reported for the first time in which it can take advantage of easy processing of the ridge structure and the excellent mode characteristic of BRS. At the wavelength range of 1550-1600 nm, lossless operation with extinction ratios of 25 dB dc and more than 10 GHz 3 dB bandwidth is successfully achieved. The beam divergence angles of the input and output ports of the device are as small as 8.0 • × 12.6 • , resulting in 3.0 dB coupling loss with a cleaved single-mode optical fibre.

Colorless 1.25Gbps WDM-PON link using injection locking and electroabsorption transceiver

“…Also, we expect enhanced data rate in both up/down links compared to the conventional WDM-PON scheme using RSOA and FP-LD. Recent studies about integrating EAM with SOA [6] can be useful for a possible single component ONU implementation.…”

Mask pattern interference in AlGaInAs selective area metal-organic vapor-phase epitaxy: Experimental and modeling analysis

“…Examples of such integrations are distributed feedback laser/ electroabsorption modulator ͑EAM͒, 3 integrated tunable distributed Bragg reflector laser/EAM, 4 semiconductor optical amplifier/EAM, 5,6 or more complex devices such as selectable wavelength light sources for dense wavelength division multiplexing. 7 In order to realize and control complex monolithic integrations with SAG band-gap engineering, we report here on the development of a predictive modeling tool.…”