Imaging probe

An imaging probe, suitable to be inserted into a tubular object to detect an interior image of the tubular object, comprising:

• a light source excitation assembly comprising:
• a pulsed laser suitable to generate a pulsed light energy;
• a first optical fiber having a first incident end and a first emitting end, the first incident end receiving the pulsed light energy, and the pulsed light energy leaving the first optical fiber via the first emitting end;
• and
• a cone-shaped reflecting member having a tapered end facing the first emitting end, the cone-shaped reflecting member being suitable to reflect the pulsed light energy emitted from the first emitting end and convert a part of the pulsed laser energy into an ultrasonic signal to let the other part of the pulsed laser energy and the ultrasonic signal annularly irradiate an inner wall of the tubular object, the ultrasonic signal irradiating the inner wall of the tubular object to produce an ultrasonic echo signal, and the pulsed laser energy irradiating the inner wall of the tubular object to produce a photoacoustic signal;
• and
• a receiver having a receiving portion near the first emitting end, and the receiving portion being configured to receive the photoacoustic signal and the ultrasonic echo signal, wherein the receiver is a polymer micro-ring resonator for ultrasonic wave detection, and the receiver comprises:
• a tunable laser suitable to provide continuous light signals with different wavelengths;
• a second fiber having a second incident end, a second emitting end and a ring-shaped bending portion, the second incident end receiving the continuous light signals, and the continuous light signals leaving the second fiber via the second emitting end;
• and
• a plurality of micro-rings disposed around a periphery of the ring-shaped bending portion, sizes of micro-rings being different, and the receiving portion comprising the micro-rings and the ring-shaped bending portion.