Patent ID: 8638431

Claim:
A microfluidic device for performing Raman spectroscopy comprising: at least one microfluidic channel with an input and an output for allowing fluid flow; and at least one Raman fiber based probe having an excitation fiber probe positioned so that one end of the excitation fiber probe is in the microfluidic channel and a collection fiber probe positioned so that one end of the collection fiber probe is in the microfluidic channel, the excitation fiber probe and the collection fiber probe are orthogonal to each other, wherein the excitation fiber probe includes an excitation probe head that is embedded in the microfluidic device and houses an end of the excitation fiber, a bandpass filter for blocking all light except excitation light, a collimator for collimating light incident on the bandpass filter, and lens for focusing excitation light onto a sample; and the collection fiber probe including a collection probe head that is embedded in the microfluidic device and houses an end of the collection fiber probe, a longpass filter for allowing Raman signals to pass the collection fiber probe and blocking excitation light, and a collimator for collimating light collected from the sample before it is incident on the longpass filter.