Highly Sensitive Microsensor Based on Absorption Spectroscopy: Design Considerations for Optical Receiver

Abstract

The development of a biomedical sensor involves an extremely sensitive optoelectronics system whose foundations lie on intracavity absoprtion spectroscopy. In order to make it convenient for technical reasons to use this application based utility, we implement dual mode competition. All of the components in this system must be investigated in detail. This work concerns with the design of the optical receiver which is mandatory to understand and analyze the received signal. This has been effectively done by designing an inexpensive system which replaces the existing Agilent based setup. Next, the performance of the system has been investigated by using an important parameter Relative Intensity Noise (RIN). The variation of injection current and temperature and their subsequent effect on RIN has been comprehensively examined. This has been enhanced by an investigation of RIN as subject to the mode positions (values of wavelengths) at which the framework is being operated. Through these considerations, the system's behaviour is understood in a much better way as they lead to an improvement in the sensor's realization with high sensitivity and stability.

Keywords

• Semiconductor laser diode
• optical receiver
• relative intensity noise
• cavity optomechanics
• biomedical sensor