Fig. 1. (a) Experimental setup for the measurement of SRS-induced dispersion. LPF: low-pass-filter; DAQ: data acquisition; PC: polarization controller; EDFA: erbium-doped fiber amplifier. The calibration phase modulator is made by wrapping single-mode fiber (SMF) around a piezoelectric tube. Filter 1 is used to filter out the amplified spontaneous emission noise of the EDFA. WDM 1/2: 1620 nm/1530 nm wavelength-division multiplexer. WDM 1 is used to combine the pump and signal beams and WDM 2 is used to filter out the pump. Inset: scanning electron microscopy image of the HC-PCF (HC-1550-06 fiber with core diameter of ∼11μm). (b) SRS-induced RI change measured with an 80-m-long HC-PCF filled with 4 bar hydrogen.

Fig. 2. Experimental setup and results of dynamically controlling the laser-induced pulse delay with SRS in a hydrogen-filled HC-PCF. (a) The experimental setup. IM represents the intensity modulator. (b) The observation of 1 ns signal pulse delay with the relative signal pulse power amplification of 10 dB using 4 bar hydrogen-filled, 80 m-long HC-PCF. (c) The demonstration of dynamically controlling the signal pulse delay by varying the signal power amplification with different hydrogen pressures.

Fig. 3. (a) Experimental setup for the measurement of the Raman resonance linewidth. (b) The measured Raman resonance of the 80-m-long hydrogen-filled HC-PCF. The FWHM of the Raman resonance is estimated to be 230, 334, and 524 MHz for 2.5, 4, and 5.5 bar hydrogen, respectively.