In general, this disclosure describes various optical ultrasound transducers and methods of producing such. As one example, an optical ultrasound transducer comprises an optical fiber and a polymer layer formed on the optical fiber to receive light from the optical fiber. The polymer layer may absorb light of a first wavelength and be substantially transparent to light of a second wavelength. In response to the light of the first wavelength, the polymer layer may generate an acoustic tone. The optical ultrasound transducer may further include an optical detector formed on the polymer layer, the optical detector comprising an etalon structure having a first mirror layer and a second mirror layer separated by a compressible layer, wherein the compressible layer resonates in response to the light of the second wavelength passing through the polymer layer and is compressible in response to acoustic pressure from echoes of the acoustic tone.
