Agency for Science, Technology and Research

Rain Tree Photonics Pte. Ltd.

Fujikura Limited

Tsung-Yang Liow

Mingbin Yu

Xiaoguang Tu

Ying Huang

Guo Qiang Patrick Lo

Guo-Qiang Patrick Lo

Patrick Guo-Qiang Lo

Qing Fang

Kensuke Ogawa

Kazuhiro Goi

Junfeng Song

Xianshu Luo

Kah Wee Ang

Eu-Jin Andy Lim

Andy Eu-Jin Lim

Haifeng Zhou

A method for in-line optical testing is provided. The method includes providing a substrate, forming an optical device on the substrate, and forming a test circuit on the substrate, the test circuit being optically coupled to the optical device. An optical test is performed on the optical device with the test circuit. The test circuit is then removed.

Method for in-line optical testing

A scavenging photodetection device () is provided. The scavenging photodetection device () includes an optical coupling portion () and a scavenging photodetection portion (). The optical coupling portion () includes an optical coupler () configured to receive light from a light source, a plurality of light absorbers () arranged to absorb the light from the light source that is not collected by the optical coupler (), and at least one primary input waveguide () optically coupled to the optical coupler () and configured to direct collected light to a photonic integrated circuit. The scavenging photodetection portion () includes a primary photodetector () configured to collect uncollected light from the optical coupling portion () to determine an alignment position of the photonic integrated circuit.

Scavenging photodetection device

A photonics packaging method is provided. The photonics packaging method includes providing a substrate () and attaching a first optical device () to the substrate (). The first optical device () includes a first mode converter () optically coupled to a first integrated photonics chip (). A second optical device () is also attached to the substrate (). The second optical device () includes a second mode converter () optically coupled to a second integrated photonics chip (). The second optical device () is of a greater height than the first optical device (). An index-matching material () is disposed in a space between the first and second optical devices () and () and a force is applied on the second optical device () to cause the second optical mode converter () to align with the first optical mode converter (). The index-matching material () is subsequently cured.

Photonics packaging method

An optical waveguide device includes a substrate; a lower cladding disposed on the substrate; a rib waveguide including a slab disposed on the lower cladding and a single rib disposed on the slab contiguous to the slab; and an upper cladding disposed on the rib waveguide. The rib waveguide includes a first doped region having a first electric conductivity exhibiting a P-type electric conductivity across the rib and the slab and a second doped region being contiguous to the first doped region and having a second electric conductivity exhibiting an N-type electric conductivity across the rib and the slab.

Optical waveguide device and method of manufacturing the same

According to one aspect of the invention, there is provided a pin photodetector comprising a dopant diffusion barrier layer disposed within an active light absorbing region of the pin photodetector.

P-I-N photodiode with dopant diffusion barrier layer

An optical circuit for sensing a biological entity in a fluid and a method of configuring an optical circuit for sensing a biological entity in a fluid are provided. The optical circuit includes a sensing arrangement including a reference arm having a reference waveguide and a sensing arm having a waveguide; wherein lengths of the reference waveguide and the waveguide are configured in accordance with a temperature dependency reduction criterion.

Optical circuit for sensing a biological entity in a fluid and method of configuring the same

An optical light source is provided. The optical light source includes a waveguide including two reflectors arranged spaced apart from each other to define an optical cavity therebetween, an optical gain medium, and a coupling structure arranged to couple light between the optical cavity and the optical gain medium.

Optical light source

An optical modulator and a method for manufacturing an optical modulator are provided. The optical modulator includes a first waveguide, a second waveguide, a modulating portion connected between the first waveguide and the second waveguide, the modulating portion being configured to receive an input signal from the first waveguide, to modulate the input signal and to supply a corresponding modulated input signal as an output signal to the second waveguide, wherein the modulating portion includes a semiconductor substrate, one end thereof being coupled to the first waveguide, and a corresponding opposite end thereof being coupled to the second waveguide, a Germanium rib provided on the substrate such that the input signal propagates through the Germanium rib along a longitudinal axis thereof, and a first electrode and a second electrode respectively provided on the substrate, wherein the Germanium rib is provided between the first electrode and the second electrode, and wherein the first electrode and the second electrode are configured to apply an electrical field to the Germanium rib in order to modulate the input signal propagating through the Germanium rib.

Optical modulator and method for manufacturing the same

According to embodiments of the present invention, an optical modulator is provided. The optical modulator includes a depletion region comprising a junction between from a first conductivity type portion and a second conductivity type portion, a first intrinsic region, and a second intrinsic region, and wherein the depletion region is disposed between the first intrinsic region and the second intrinsic region.

Optical modulator and a method of forming the same

An optical converter and a method of manufacturing the optical converter are provided. The optical converter may include a signal receiving portion configured to receive an optical signal from an optical fiber which can be coupled to the optical converter, a signal output portion configured to output the optical signal received by the signal receiving portion, and a signal coupling portion being disposed between the signal receiving portion and the signal output portion and being configured to couple the optical signal received by the signal receiving portion into the signal output portion. The signal output portion may include a waveguide element having at least one tapered end section, and being partially or wholly surrounded by the signal coupling portion. The at least one tapered end section may be configured to couple the optical signal from the signal coupling portion into the waveguide element and the waveguide element may be configured to output the optical signal.

Growing community of inventors

Singapore, Singapore

Tsung-Yang Liow