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.
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.
We report a temperature and pressure sensor based on fiber Bragg grating(FBG) lasers, the analytical expressions for
the shift of the Bragg wavelength with temperature and pressure are derived, the effect of operation temperature of
fiber Bragg grating on the central wavelength of fiber Bragg grating laser is discussed experimentally. The result
demonstrates that the central wavelength of laser is a function of the operation temperature of FBG, and the
temperature coefficient of the fiber Bragg grating is 1.27×10<sup>-5</sup>/°C.
In this paper, we propose a nonlinear single-mode fiber FP cavity, in which CRDS is researched theoretically, and the
relationship expression between output electric field amplitude and nonlinear phase shift is derived. Numerical results
demonstrate that the output performance of nonlinear single-mode fiber Fabry–Perot cavity includes three phases:
build-up, stability, and ring-down phase, output power is inversely proportional to the power in the cavity, when the
power in cavity is larger than 2W, the stable time for output signal with instability becomes longer, but the effect of
self-phase modulation on CRD time is ignoring.
In this paper, a novel optical generation of millimeter waves based on the birefringence in a single-mode fiber ring cavity is proposed and investigated theoretically. The input pulsed laser stimulates two orthogonal eigen-modes in a single-mode fiber ring cavity, the birefringence of single-mode fiber causes a phase mismatch for the two eigen-modes, this phase mismatch leads the generation of millimeter waves, out of the ring cavity a pigtail polarizer is used to combine the two eigen-modes, and then the millimeter wave signal is obtained by using heterodyne method. The effects of straight- through coupling coefficients, phase delay factor, and refractive index difference on millimeter wave signal are discussed.