Science and Engineer Importance to Singapore

Singapore has boosted its water supply through water-recycling and also increased its land area by reclaiming land, all feats accomplished by engineers. And engineering will continue to be important for Singapore's future, as the country works towards becoming a smart nation and overcoming its lack of resources
Prime Minister Lee Hsien Loong
(50th anniversary celebration of the IES)
Logo of LIM Jun Long

LIM Jun Long Laboratory


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Optical fiber

An optical fiber (or optical fibre) is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.

Typical Optical fiber

Single Mode Fiber


Types of Optical fiber

Photonic Crystal fiber (PCF)

Photonic-crystal fiber (PCF) is the state of the art new class of optical fiber based on the properties of photonic crystals.

Types of PCF

PCF Sensors and their Application

PCF Temperature Sensor

PCF Strain Sensor

PCF Refractive Index Sensor

PCF Biosensor

Fiber optic sensor

A fiber optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals ("extrinsic sensors").

Fiber Bragg Gratings (FBG)

A fiber Bragg grating (FBG) is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and transmits all others.

Operating Principle of FBG

FBG Sensors and Their Application

Long Period Gratings (LPG)

Operating Principle of LPG

LPG Sensors and Their Applications

Optical Time-Domain Reflectometer (OTDR) for Sensing

An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. An OTDR is the optical equivalent of an electronic time domain reflectometer.

Phase Sensitive Optical Time Domain Reflectometer (OTDR)

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