Generation of 50-fsec pulses from a pulse-compressed, cw, passively mode-locked Ti:sapphire laser (original) (raw)
Related papers
Pulse evolution dynamics of a femtosecond passively mode-locked Ti:sapphire laser
Optics Letters, 1992
The pulse-formation process in a femtosecond passively mode-locked Ti:sapphire laser with a saturable absorber is investigated. The time to reach the steady state is -200 As. The formation time dependence on the dye concentration and the coincidence of the steady-state pulse width with the self-mode-locked state without a saturable absorber indicate that the function of the saturable absorber is mainly to induce the initial modulation and to shorten the pulse-formation time.
Compression of intra-cavity chirped pulses from a cw passive mode-locked Ti:Sapphire lasera
Optics Communications, 1990
Chirped pulses can be directly obtained from a cw passive mode-locked Ti:sapphire laser as a result of self-phase modulation inside the cavity. If a grating-prism pair is used, chirped pulses of 15.4 ps are compressed to 2.4 ps, assuming a sech 2 pulse shape. The pulses are almost at the transform limit for the observed spectral width of around 785 nm.
Japanese Journal of Applied Physics, 2010
Extracavity pulse compression for pulses from an 82 MHz mode-locked Ti:sapphire laser is demonstrated by utilizing a tapered fiber of 1 mm in diameter and 10 mm in length. Group velocity dispersion of the tapered fiber is calculated, which shows two zero dispersion wavelengths locating at 545 and 1250 nm, respectively. The nonlinear coefficient of the tapered fiber is estimated to be 733 (W À1 km À1) at 880 nm wavelength. With 80 fs input pulses at 880 nm center wavelength, the optical bandwidth is broadened beyond 22 THz by the tapered fiber. After dispersion compensation by a grating pair with 1.45 cm separation, 26 fs output pulses are obtained. One-third pulse compression ratio has been experimentally demonstrated in this work for center wavelengths ranging from 720 to 880 nm.
2011
The correlation between mode locked pulse and its corresponding femtosecond generation are reported. A non-self starting Ti:sapphire laser was aligned to induce mode locked pulse. The cavity length was adjusted in the range from 104 to 105 mm to stabilize the mode locked pulse train. The mode locked pulse was recorded via high speed oscilloscope at various cavity lengths in the stability region. The corresponding femtosecond pulse generation was simultaneously measured via autocorrelator. This is referred as conjugate method. The result shows that the femtosecond pulse found to be having a linear relationship with mode locked pulse with the conversion efficiency achieved up to 8%.
Generation of 50-fs, 5-nJ pulses at 1.03 μm from a wave-breaking-free fiber laser
Optics Letters, 2003
We report the generation of 6-nJ chirped pulses from a mode-locked Yb fiber laser at 1.03 mm. A linear anomalous-dispersion segment suppresses wave-breaking effects of solitonlike pulse shaping at high energies. The dechirped pulse duration is 50 fs, and the energy is 5 nJ. This laser produces twice the pulse energy and average power, and approximately five times the peak power, of the previous best mode-locked fiber laser. It is to our knowledge the first fiber laser that directly offers performance similar to that of solid-state lasers such as Ti:sapphire.
Fiber delivery of femtosecond pulses from a Ti:sapphire laser
Optics Letters, 2001
We propose a way to deliver nanojoule-energy, 100-fs pulses at 800 nm through a few meters of standard optical fiber. Pulses from a mode-locked laser are compressed temporally, and then spectrally, to produce the desired pulses at the end of the fiber. Initial experiments agree well with calculations and demonstrate the benefits of this technique: For an energy of ϳ0.5 nJ, the delivered pulses are ϳ5 times shorter than those delivered by other techniques. The issues that must be addressed to scale the technique up to delivered pulse energies of 5 nJ are identified, and the apparatus employs only readily available components. Thus we expect it to find use in the many applications that would benefit from fiber delivery of femtosecond pulses.
Quantum Electronics, 1999
An analysis is made, with the aid of the selfconsistent nonlinear ABCD matrix method, of the specific features of the mechanism of passive mode locking of a femtosecond Ti : sapphire laser under conditions of pulsed synchronous pumping. The conditions of stable laser operation are studied. It is proposed to use an additional aperture as an element of negative feedback for the stabilisation of passive mode locking. Practical recommendations concerning the optimisation of a femtosecond laser are given.
Continuous-wave mode-locked Ti:sapphire laser focusable to 5 × 10^13 W/cm^2
Optics Letters, 1998
Generation of sub-10-fs pulses with an average power of 1 W and a peak of 1.5 MW from a Kerr-lens mode-locked mirror-dispersion-controlled Ti:sapphire laser is demonstrated. A specially designed lens triplet focuses the output of this compact all-solid-state source to a peak intensity in excess of 5 3 10 13 W͞cm 2 . Nonperturbative nonlinear optics is now becoming feasible by use of the output of a cw mode-locked laser.
Spatial–temporal analysis of the self-mode-locked Ti: sapphire laser
Journal of the Optical Society of America B, 1993
We employ our extended spatial-temporal matrices to analyze the Ti: sapphire self-mode-locked laser. Our results agree with previously reported experimental work and give us a deeper understanding of the way this laser functions. We found the pulse-shaping mechanism to be essentially solitonlike; the role of the aperture is to discriminate against cw operation. We also study the buildup of the pulse starting from a fluctuation.