Picosecond laser pulses

DeMaria, A. J.; Glenn, William H.; Brienza, M. J.; Mack, M.

doi:10.1109/proc.1969.6864

Cited by 201 publications

(17 citation statements)

References 107 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distance from the observation point to the surface is r, and 9 is the angle between direction of observation and surface normal. With these definitions the intensity I(r,8) of diffusely reflected light observed at the point (r,6) is given by e*f (1) (U) The specular reflection from a convex spherical surface of radius of curvature p diverges from a virtual focus distance %p behind the surface. For a surface of diameter 2a and reflectivity R, the reflected intensity at a distance r from the surface is given by I(r, 9) = I 0 Rl = 0 .…”

Section: Calculations and Discussion Of Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Studies of Optical Augmentation With Picosecond Pulses. Picosecond Pulses for Resolution of Optical Elements by Retroreflection

Eckardt¹,

Rabin²

1971

View full text Add to dashboard Cite

Section: Calculations and Discussion Of Resultsmentioning

confidence: 99%

“…This information exists in the open literature, and the article by DeMaria gives a thorough review (1). The longitudinal cavity modes of a laser can be coupled together by nonlinear interactions such as the saturable absorption produced in certain dye molecules.…”

Section: Experimental Measurementsmentioning

confidence: 99%

Studies of Optical Augmentation With Picosecond Pulses. Picosecond Pulses for Resolution of Optical Elements by Retroreflection

Eckardt¹,

Rabin²

1971

View full text Add to dashboard Cite

“…3, lower signal) typically consists of a series of equally spaced high-peak-power pulses (1). Pulse widths are normally much less tl, an 10-9 sec, while the spacing between pulses (twice the optical length of the oscillator cavity) is on the order of 5 to 10 nsec.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…Uses for Q-switched optical pulses include generating pismas, optical harmonic generation, stimulated Raman, Brillouin, and Rayleigh-wing scattering, photon echos, self-induced optical transparency, optical self-trapping, and optical parametric amplification (1). Unfortunately, the required buildup time for a Q-switched (,ptical pulse places a minimum pulse width limit of about 10-8 sec.…”

Section: Introduciionmentioning

confidence: 99%

Parallel Plate Transmission Line Pockels Cell

Letellier¹

1972

View full text Add to dashboard Cite

“…Pulse shortening occurs in the saturable absorber cell. (For reviews on mode-locking see [1][2][3][4][5][6][7].) The natural mode selection in the active medium acts against the shortening.…”

mentioning

confidence: 99%

Analysis of temporal pulse development in passively mode-locked lasers

1984

View full text Add to dashboard Cite

Abstract. Pulse-shortening and pulse broadening effects in passively mode-locked lasers are analysed. A steady-state pulse duration limit is calculated and compared with round-trip simulations. The numerical calculations apply to a picosecond Nd: glass laser. Methods of short-pulse generation are discussed. 42.55R, 42.60D, 42.65 In passively mode-locked pulsed lasers the statistical spontaneous emission bursts have a duration approximately equal to the inverse of the fluorescence linewidth. In the linear laser phase (constant dye absorption) the finite spectral gain profile of the active medium narrows the spectral width and broadens the duration of the circulating spikes. In the nonlinear laser phase (nonlinear dye transmission, mode-locking region) the most intense spike is preferentially amplified and strong background discrimination is achieved. Pulse shortening occurs in the saturable absorber cell. (For reviews on mode-locking see [1][2][3][4][5][6][7].) The natural mode selection in the active medium acts against the shortening. Intensity dependent loss mechanisms like two-photon absorption in Nd: glass rods [8] broaden the pulse duration at high laser intensities [9]. In this paper we analyse the pulse shortening and pulse broadening effects in passively mode-locked lasers. Intensity-dependent stationary pulse durations are found by equating pulse shortening and pulse broadening per round-trip in the laser oscillator. In the mode-locking region the transient temporal development of a picosecond pulse with constant background level is simulated and the approach to the stationary situation is studied. The theory presented applies to all passively modelocked lasers, either pulsed or continuously working [10]. The numerical calculations in this paper apply to a passively mode-locked Nd: glass laser. The calculations reveal conditions for optimum shortpulse generation in the oscillator. Preliminary measurements with a Pockels cell intensity limiter in the resonator led to pulse shortening in agreement with the theory. PACS: Stationary Pulse DurationsThe changes of pulse duration per round-trip in the oscillator are analysed. Pulses are broadened by the finite spectral width of the gain and by intensity dependent nonlinear losses. Here pulse broadening by two-photon absorption in Nd: glass rods is discussed. Pulse shortening occurs in the nonlinear transmission region of the saturable absorber. The pulse duration ratio f$ = At L0 /At Lb where At L0 is the pulse duration after n +1 round-trips and At Li the pulse duration after n round-trips, is given byj8 GAIN is the ratio of pulse broadening by the finite spectral width of the gain profile. /J XPA represents the ratio of pulse broadening by two-photon absorption in the active medium. /J DYE is the pulse shortening ratio of the saturable dye.The spectral gain profile of the active medium approximately has the form [9]

show abstract

Picosecond laser pulses

Cited by 201 publications

References 107 publications

Studies of Optical Augmentation With Picosecond Pulses. Picosecond Pulses for Resolution of Optical Elements by Retroreflection

Studies of Optical Augmentation With Picosecond Pulses. Picosecond Pulses for Resolution of Optical Elements by Retroreflection

Parallel Plate Transmission Line Pockels Cell

Analysis of temporal pulse development in passively mode-locked lasers

Contact Info

Product

Resources

About