Broadband fiber-optical parametric amplification for ultrafast time-stretch imaging at 1.0 μm.

摘要: We demonstrate a broadband all-fiber-optical parametric amplifier for ultrafast time-stretch imaging at 1.0 μm, featured by its compact design, alignment-free, high efficiency, and flexible gain spectrum through fiber nonlinearity- dispersion-engineering: specifically on dispersion-stabilized photonic-crystal (PCF) to achieve net over 20 THz (75 nm) highest of ∼6000 (37.5 dB). Another unique feature the amplifier, other optical amplifiers, is coherent generation synchronized signal replica (called idler) that can be exploited offer an extra 3-dB optically superposing idler. It further enhances contrast temporal stability. For proof-of-concept purpose, ultrahigh speed diffraction-limited microscopy demonstrated with single-shot line-scan rate 13 MHz based dual-band (signal detection. Our scheme extended established bioimaging modalities, such as coherence tomography, near infrared fluorescence, photoacoustic imaging, where weak detection required.