OCT combining probes and integrated systems
View Patent ↗Optical coherence tomography (OCT) probe and system designs are disclosed that minimize the effects of mechanical movement and strain to the probe to the OCT analysis. It also concerns optical designs that are robust against noise from the OCT laser source. Also integrated OCT system-probes are included that yield compact and robust electro-opto-mechanical systems along with polarization sensitive OCT systems.
1. A polarization sensitive optical coherence tomography probe, comprising:
a probe body;
an interference signal fiber coupler in the probe body that receives an optical coherence tomography (OCT) signal from a swept source laser of an OCT analysis system and divides the OCT signal between a reference optical fiber arm and a signal optical fiber arm;
an optical window in the probe body through which the OCT signal from the signal optical fiber arm is transmitted to an object of interest and through which an object OCT signal is received from the object of interest and coupled into the signal optical fiber arm; and
a polarization rotation element that rotates the polarization of the OCT signal from the reference optical fiber arm;
wherein the object OCT signal is mixed with the OCT signal from the reference optical fiber arm to generate an interference signal that is transmitted from the probe body to the OCT analysis system, which comprises a polarization beam splitter for separating the interference signal into two polarizations, a parallel detector for detecting the interference signal that is polarized parallel to the OCT signal, and a perpendicular detector for detecting the interference signal that is polarized perpendicular to the OCT signal from the swept source laser.
2. A probe as claimed in claim 1 , wherein the reference optical fiber arm comprises polarization maintaining optical fiber.
3. A probe as claimed in claim 2 , wherein the signal optical fiber arm comprises polarization maintaining optical fiber.
4. A probe as claimed in claim 2 , wherein the interference signal fiber coupler is a polarization maintaining coupler.
5. A probe as claimed in claim 1 , wherein the polarization rotation element is a quarterwave plate.