Search query: Active stabilization of a diode laser injection lock

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abstract: We report on a device to electronically stabilize the optical injection lock of a semiconductor diode laser. Our technique uses as discriminator the peak height of the laser's transmission signal on a scanning Fabry Perot cavity and feeds back to the diode current, thereby maintaining maximum optical power in the injected mode. A two component feedback algorithm provides constant optimization of the injection lock, keeping it robust to slow thermal drifts and allowing fast recovery from sudden failures such as temporary occlusion of the injection beam. We demonstrate the successful performance of our stabilization method in a diode laser setup at 399 nm used for laser cooling of Yb atoms. The device eases the requirements on passive stabilization and can benefit any diode laser injection lock application, particularly those where several such locks are employed.
author_names: Brendan Saxberg

Benjamin Plotkin-Swing

Subhadeep Gupta
title: Active stabilization of a diode laser injection lock.
venue: The Review of scientific instruments
year: 2016

abstract: A gain switched, single frequency titanium sapphire laser for atmospheric humidity measurements using the differential absorption lidar technique operating in the 820 nm wavelength region is described. The laser is pumped by a frequency doubled, flashlamp pumped Nd:YAG laser at a repetition rate of 50 Hz and injection seeded by two external cavity diode lasers. The system yields pulses with an energy of 15 mJ and high spectral purity. We describe a novel active injection locking technique that avoids the problems of established methods like dither lock or ramp and fire. Furthermore, our method opens the possibility to switch between two wavelengths for alternating shots, in contrast to most established techniques that only allow operation at one wavelength.
author_names: Klaus Ertel

Holger Linne

Jens Bosenberg
title: Injection seeded pulsed Ti:sapphire laser with novel stabilization scheme and capability of dual wavelength operation.
venue: Applied optics
year: 2005

abstract: Due to circumstances beyond the presenter's control, and audio recording was not possible for this presentation.
author_names: Vasily V Spirin

Jose Luis Bueno Escobedo

Krassimir Panajotov

Patrice Megret

Dmitry A Korobko

Igor Zolotovskii

Andrei A Fotiadi
title: Active stabilization of the DFB laser injection locked to an external fiber optic ring resonator
venue: Photonics Europe
year: 2020

abstract: Based on an analysis of differences between the experimentally measured temperature dependence of the current voltage characteristic (I V curve) of a laser diode bar (LDB) with AlGaAs/GaAs heterostructure and the dependence obtained in accordance with the well known model of light emitting diodes, assumptions were made about the sources of these differences. The agreement between the experimental and modeled dependences is significantly improved by taking into consideration the change in the resistance of LDB layers caused by temperature change. It is shown that when the injection current is known, the measured voltage drop across the LDB can be used to estimate the temperature of the diode active region in order to implement thermal stabilization for solid state laser pumping systems based on high power laser diodes.
author_names: A N Aparnikov

E V Buryi

N E Orlov
title: Temperature Dependence Model of the Laser Diode Bar Current Voltage Characteristic
venue: Optoelectronics, Instrumentation and Data Processing
year: 2019

abstract: Self injection locking to an external fiber cavity is an efficient technique enabling drastic linewidth narrowing and self stabilization of semiconductor lasers. The main drawback of this technique is its high sensitivity to fluctuations of the configuration parameters and surroundings. In the proposed laser configuration, to the best our knowledge, for the first time the self injection locking mechanism is used in conjunction with a simple active optoelectronic feedback, ensuring stable mode hopping free laser operation in a single longitudinal mode. Locking to 4 m length fiber resonator causes a drastic narrowing of the DFB laser linewidth down to 2.8 kHz and a reduction of the laser phase noise by three orders of magnitude. We have explored key features of the laser dynamics with and without active feedback, revealing stability and tunability of the laser linewidth as an additional benefit of the proposed technique.
author_names: Vasily V Spirin

Jose Luis Bueno Escobedo

Dmitry A Korobko

Patrice Megret

Andrei A Fotiadi
title: Stabilizing DFB laser injection locked to an external fiber optic ring resonator.
venue: Optics express
year: 2020

abstract: Self injection locking to an external fiber cavity is an efficient technique enabling drastic linewidth narrowing and self stabilization of semiconductor lasers. The main drawback of this technique is its high sensitivity to fluctuations of the configuration parameters and surroundings. In the proposed laser configuration, to the best our knowledge, for the first time the self injection locking mechanism is used in conjunction with a simple active optoelectronic feedback, ensuring stable mode hopping free laser operation in a single longitudinal mode. Locking to 4 m length fiber resonator causes a drastic narrowing of the DFB laser linewidth down to 2.8 kHz and a reduction of the laser phase noise by three orders of magnitude. We have explored key features of the laser dynamics with and without active feedback, revealing stability and tunability of the laser linewidth as an additional benefit of the proposed technique. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
author_names: S V

B L
title: Stabilizing DFB laser injection locked to an external fiber optic ring resonator
year: 2020

abstract: We have demonstrated wavelength stabilization in an 821 nm AlGaAs three section tunable distributed Bragg reflector (DBR) semiconductor laser diode (LD) that consists of active, phase controlled, and DBR regions. We injected two separate, complementary currents into the active and the phase controlled regions in the DBR LD to suppress wavelength shift. This modulation method was applied to the LD fundamental wave in a second harmonic generation (SHG) laser, and the oscillating wavelength was maintained within the phase matching acceptance range of the SHG device during modulation. A peak blue violet light power of 62 mW was obtained for the ideal modulation waveform.
author_names: Yasuo Kitaoka

Ken'ichi Kasazumi

Akihiro Morikawa

T Yokoyama

Tomoya Sugita

Kiminori Mizuuchi

K Yamamoto

Toru Takayama

S Takigawa

Masaaki Yuri
title: Wavelength stabilization of a distributed Bragg reflector laser diode by use of complementary current injection.
venue: Optics letters
year: 2003

abstract: We report the active frequency stabilization of a diode pumped microchip Nd:YAG laser using a frequency modulation sideband locking technique. The novel aspect of this scheme is that the piezo mounted output coupler acts as both the frequency modulator and the frequency correcting element. When the laser is locked to a reference cavity of 300 MHz free spectral range and 5 MHz linewidth, the laser frequency stability is found to be 88 kHz relative to the cavity.
author_names: Feng Zhou

Allister I Ferguson
title: Frequency stabilization of a diode laser pumped microchip Nd:YAG laser at 1.3 microm.
venue: Optics letters
year: 1991

abstract: We implemented an optical frequency standard based on noise immune cavity enhanced optical heterodyne molecular spectroscopy (NICE OHMS) at 1.39 mm. The emission frequency of an extended cavity diode laser was actively stabilized against the center of the 4(4,1) 4(4,0) transition of the H(2)(18)O n1+n3 band, under optical saturation conditions. The nonlinear regime of laser gas interaction was reached by using an optical cavity with a finesse of about 8700. By filling it with an 18O enriched water sample at a pressure of a few Pa, the Lamb dip could be observed with a full width at half maximum of about 2 MHz. Absolute frequency stabilization was obtained by locking the cavity resonance to the center of the sub Doppler signal, which was provided by the NICE OHMS technique under the dispersion regime of operation. An Allan deviation analysis demonstrated a relative frequency stability of ~5x10( 13) for an integration time of 1 s. For longer integration times, the flicker frequency noise floor set the stability at the level of 4x10( 14)
author_names: Hemanth Dinesan

Eugenio Fasci

Antonio Castrillo

Livio Gianfrani
title: Absolute frequency stabilization of an extended cavity diode laser by means of noise immune cavity enhanced optical heterodyne molecular spectroscopy.
venue: Optics letters
year: 2014

abstract: Self injection locking, an efficient method to improve the spectral performance of semiconductor lasers without active stabilization, has already demonstrated its high potential for operation with single longitude mode fiber lasers urgently demanded by new applications in optical metrology and spectroscopy, coherent optical communications, distributed fiber sensing. The laser operation stability remains to be a crucial issue for such laser applications. Here, we present a theoretical framework for modeling of semiconductor laser coupled to an external fiber optic ring resonator. The developed approach has shown good qualitative agreement with theoretical predictions and experimental results for particular configuration of a self injection locked DFB laser delivering narrow band radiation and particular employed in Brillouin fiber laser configurations. The model is capable of describing the main features of the experimentally measured laser outputs such as laser line narrowing, spectral shape of generated radiation, mode hoping instabilities and makes possible exploring the key physical mechanisms responsible for the laser operation stability.
author_names: Dmitry A Korobko

Igor O Zolotovsky

Krassimir Panajotov

Vasily V Spirin

Andrei A Fotiadi
title: Modeling of a semiconductor laser coupled to an external fiberoptic ring resonator
venue: Photonics Europe
year: 2018