Single-frequency tunable laser for pumping cesium frequency standards

Zhuravleva, Olga V.; Ivanov, A. V.; Leonovich, A I; Kurnosov, V D; Kurnosov, K V; Chernov, R. V.; Shishkov, V V; Pleshanov, S. A.

doi:10.1070/qe2006v036n08abeh013277

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…A special design of a single frequency emitter with a fiber Bragg grating (FBG) was proposed in [1] for pumping and detecting the reference quantum transi tion in quantum frequency standards operating on beams and vapor of cesium atoms. The laser diode (LD) and the FBG are installed on two separate ther moelectric coolers (TECs), which makes it possible to perform independent tuning to the D 2 line of cesium atoms.…”

Section: Introductionmentioning

confidence: 99%

Threshold, power, and spectral characteristics of a semiconductor emitter with a fiber Bragg grating

et al. 2012

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Section: Introductionmentioning

confidence: 99%

Threshold, power, and spectral characteristics of a semiconductor emitter with a fiber Bragg grating

et al. 2012

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“…For GaInAsP-InP lasers the half width of the laser output spectrum with a fiber Bragg grating is no more than 0.1 nm with pulsed modulation of the pump current at a frequency of up to ≈5 GHz. Other features of the output parameters of single frequency semiconductor lasers are discussed in [6][7][8][9][10][11]. Methods of creating dynamic single-frequency semiconductor lasers that operate stably to generate a single longitudinal mode even with high speed direct modulation and are used in fiber-optic communications have been examined in [12,13].…”

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Modulation response of dynamic single-mode quantum-well heterolasers in the 1.5 μm range

Кунцевич

Кононенко

2010

J Appl Spectrosc

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Numerical modelling is used to study the effect of tuning the laser output over the gain bandwidth on the modulation response of GaInAs-GaInAsP quantum-well heterolasers for different modulation frequencies of the pump current. It is found that the maximum frequency bandwidth of the response band and the greatest feasibility of high speed modulation for transmission of signals in information systems are achieved in the center of the gain band. Raising the dc component of the pump current increases the response bandwidth. For typical parameters of this system (near 1.5 μm) the maximum response bandwidth can approach ≈40 GHz.For certain parameters, the amplitude-frequency characteristics of the heterolasers have two local maxima: one at low frequency corresponding usually to a resonance for the 1/2 subharmonic and one at high frequency, for the fundamental resonance.Introduction. Solving a number of scientific and practical problems requires single-mode (single frequency) semiconductor lasers with a narrow and stable emission line. Furthermore, in a number of cases the frequency of the laser radiation must be tuned over a certain range within the confines of the gain band. As a rule, single frequency operation is obtained using an external dispersive cavity. For example, narrow band cw lasing (Δλ ≤ 0.15 nm) at an output power of up to 20 mW tuneable over an interval of ≈10 nm around the central wavelength of 884 nm has been obtained [1] in a GaAs-AlGaAs heterolaser with an external dispersive cavity at room temperature. Single frequency emission from a laser with stressed active layers (λ = 975 nm) and a cw power of >100 mW has been obtained [2] with suppression of side longitudinal modes at a level of >30 dB. It has been pointed out [3] that with the right position for the fixed axis of rotation of an external mirror, an injection laser can essentially be tuned continuously over its entire gain band. An external waveguide grating mirror has been used to obtain a significant narrowing (to 0.1 nm) of the output spectrum and it was shown that the output wavelength of a semiconductor laser can be tuned smoothly over a range of 10-18 nm [4].It has been noted [5] that one of the most important problems in fiber optic communications lines with channel spectral densification is the creation of laser sources with a narrow and stable spectrum (no more than 0.1 nm) that must be maintained in a dynamic regime with modulation of an information signal at frequencies up to 10 GHz. These requirements may correspond best to semiconductor lasers with external fiber Bragg gratings on single-mode fiber light guides. For GaInAsP-InP lasers the half width of the laser output spectrum with a fiber Bragg grating is no more than 0.1 nm with pulsed modulation of the pump current at a frequency of up to ≈5 GHz. Other features of the output parameters of single frequency semiconductor lasers are discussed in [6][7][8][9][10][11]. Methods of creating dynamic single-frequency semiconductor lasers that operate stably to generate a single longit...

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Study of the parameters of a single-frequency laser for pumping cesium frequency standards

et al. 2008

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In scale relativity, quantum mechanics is recovered by transcribing the classical equations of motion to fractal spaces and demanding, as dictated by the principle of scale relativity, that the form of these equations be preserved. In the framework of this theory, however, the form of the classical energy equations both in the relativistic and nonrelativistic cases are not preserved. Aiming to get full covariance, i.e., to restore to these equations their classical forms, we show that the scale-relativistic form of the Schrödinger equation yields the Pauli equation, whilst the Pissondes's scale-relativistic form of the Klein-Gordon equation gives the Dirac equation.

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Single-frequency tunable laser for pumping cesium frequency standards

Cited by 10 publications

References 3 publications

Threshold, power, and spectral characteristics of a semiconductor emitter with a fiber Bragg grating

Threshold, power, and spectral characteristics of a semiconductor emitter with a fiber Bragg grating

Modulation response of dynamic single-mode quantum-well heterolasers in the 1.5 μm range

Study of the parameters of a single-frequency laser for pumping cesium frequency standards

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