초록 ▼

The invention relates to a method for generating coherent-phase light having a predefinable frequency value (νSoll), comprising the steps of generating working light with a working frequency (νSL), generating a frequency comb (10), which is a light field that consists of equidistant coherent-phase s

The invention relates to a method for generating coherent-phase light having a predefinable frequency value (νSoll), comprising the steps of generating working light with a working frequency (νSL), generating a frequency comb (10), which is a light field that consists of equidistant coherent-phase spectral lines, selecting a comb line (having the index m) from the frequency comb (10) having a frequency (νm), generating a frequency shift (Δν) of the frequency comb (10) and/or the working frequency (νSL) by means of time-dependent phase settings (φS(t)) modulo a multiple of 2π, in particular of 2π, and phase-coupling the possibly frequency-shifted fields of the working light (νSL) and the one possibly frequency-shifted frequency comb line (νm), so that the frequencies thereof are rigidly phase-coupled via the frequency shift (Δν), and working light having the desired frequency (νSoll) is obtained.

대표청구항 ▼

1. Method for generating coherent-phase light having a predefinable frequency value (νSoll), comprising the steps of (a) generating working light with a working frequency (νSL),(b) generating a frequency comb (10), which is a light field that consists of equidistant coherent-phase spectral lines,(c)

1. Method for generating coherent-phase light having a predefinable frequency value (νSoll), comprising the steps of (a) generating working light with a working frequency (νSL),(b) generating a frequency comb (10), which is a light field that consists of equidistant coherent-phase spectral lines,(c) selecting a comb line (having the index m) from the frequency comb (10) having a frequency (νm),(d) generating a frequency shift (Δν) of the frequency comb (10) and/or the working frequency (νSL) by means of time-dependent phase settings (φS(t)) modulo a multiple of 2π, in particular of 2π, and(e) phase-coupling the possibly frequency-shifted fields of the working light (νSL) and the one possibly frequency-shifted frequency comb line (νm), so that the frequencies thereof are rigidly phase-coupled via the frequency shift (Δν), and working light having the desired frequency (νSoll) is obtained. 2. Method according to claim 1, wherein the changes in phase setting (φS(t)) are carried-out at points of time (tk) that have a temporal distance from each other of maximally one inverse (τ) of the comb line distance (fREP). 3. Method according to claim 1, wherein the frequencies and/or phase of the light field of the working light source and/or frequency comb is so controlled that the light field (24) of the working light source (22) andthe light field of the mth comb line (νm) including the frequency shift (Δν) have a well-defined phase relation to each other. 4. Method according to claim 1, wherein the working frequency (νSL) is so pre-set that it is by less than 25% of the value of the repetition frequency (fREP) away from the design frequency (νSoll). 5. Method according to claim 1 for generating light with a value of the design frequency (νSoll(t)) varying in the course of time in accordance with a predefined frequency course, wherein the value (Δν(t)) of the frequency shift is varied in the course of time by varying the progress of the phase setting (φS(tk)) in the course of time. 6. Optical frequency synthesizer comprised of (i) a tunable working light source (22) for emitting working light (24) with a working frequency (νSL),(ii) a light input (20) for coupling-in a frequency comb (10), which is a light field that consists of equidistant coherent-phase spectral lines, and(iii) a phase actuator element (36), which is set up for generating a frequency shift (Δν) of the frequency comb (10) and/or working frequency (νSL) by varying its phase setting (φS(tk)) modulo a multiple of 2π, in particular of 2π, so that by means of changes in the phase setting (φS(tk)) carried-out at periodically repeated points of time a line of the frequency comb (10) having a frequency (νm) can be shifted to a predefined design frequency (νSoll). 7. Optical frequency synthesizer according to claim 6, further comprising (iv) a control (28) for controlling the frequency and/or phase of the light field of the working light source (22) and/or a line (νm) of the frequency comb (10), so that an amount (|νSL−νm±Δν|) of a differential frequency between the working frequency staggered by Δν and the comb line frequency and/or of the working frequency and the comb line frequency staggered by Δν becomes identical to a predefinable heterodyne frequency value (νHet), which in particular may assume the value 0. 8. Optical frequency synthesizer according to claim 6, wherein the working light source (22) comprises a diode laser, in particular a laser diode with external resonator. 9. Optical frequency synthesizer according to claim 6, wherein the working light source (22) comprises a passive optical resonator that can generate a coherent-phase working light field from an irradiated coherent-phase or non-coherent-phase light field. 10. Optical frequency synthesizer according to claim 9, wherein a coherent-phase light field having the working frequency (νSL) can be efficiently generated by means of a non-linear optical element within the resonator from light fields coupled into the passive resonator, the sum frequency of which corresponds to the resonance frequency (νSL) of the resonator. 11. Optical frequency generator comprised of an optical frequency synthesizer (18) according to claim 6, anda frequency comb light source (16) for generating the frequency comb (10), which is describable as having been obtained by modulation of a carrier vibration with a carrier frequency (νC) by a complex-valued modulation function (14) with a repetition frequency (fREP).