Kaiqiang Huang

A switchable dual-wavelength fiber laser based on asymmetric fiber Bragg grating Fabry–Perot cavity with a SESAM

A switchable dual-wavelength fiber laser with an asymmetric fiber Bragg grating (FBG)–Fabry–Perot (FP) cavity based a semiconductor saturable absorber mirror (SESAM) is proposed and experimentally demonstrated. The proof of concept device consists of a FGB laser with an asymmetric FBG-FP cavity, a SESAM as mode loss modulator, and a intracavity FBG as wavelength selector by changing its operation temperature. The results demonstrate the new concept of dual-wavelength fiber laser based SESAM with asymmetric FBG-FP cavity and the technical feasibility.

Passively mode-locked Er-doped fiber laser based on a semiconductor saturable absorber mirror

In this paper, a ring cavity passively mode-locked fiber laser using a semiconductor saturable absorber mirror as saturable absorber and a fiber Bragg grating as dispersion compensator, is proposed and experimentally demonstrated, its output performance is discussed. Stable mode-locking spectrum with 3dB bandwidth of 3.2nm, center wavelength of 1555.8nm and average output power of 0.32mW is observed at the pump power of 110mW. The pulse repetition rate is 25 MHz, as determined by the cavity length of ~8m in case of the output sech2 transform-limited pulse, the output pulses duration of 0.79ps and single pulse energy of 12.64pJ are obtained.

Optical generation of tunable microwave and millimeter waves by using asymmetric fiber Bragg grating Fabry-Perot cavity fiber laser

In this presentation, we propose and experimentally demonstrate a novel optical generation of microwave and millimeter wave signals by using asymmetric fiber Bragg grating Fabry-Perot cavity fiber laser, dual-wavelength emission can be achieved with wavelength separation of 0.68nm corresponding to the millimeter wave signal at 85GHz. By appropriately adjusting the operation temperature of intracavity fiber Bragg grating, the frequency of millimeter wave signal generated can be tunable. Our experimental results demonstrate the new concept of optical generation of microwave and millimeter wave signals by using asymmetric fiber Bragg grating Fabry-Perot cavity dual-wavelength fiber laser and the technical feasibility.

Temperature sensor based on injection fiber Bragg grating laser with wavelength and temporal domain demodulation

A novel temperature sensor based on injection fiber Bragg grating laser with wavelength and temporal domain demodulation is proposed and demonstrated experimentally. The proof of concept device consists of a DFB laser modulated by a RF signal as injection light, a fiber Bragg grating laser, an optical spectrum analyzer, and a digital oscilloscope. The dynamic range of the proposed sensor is explored. The results demonstrate the new concept of temperature sensors and the technical feasibility for temperature measurement.