High Data Rate Modulation of High Power 1060-nm DBR Tapered Lasers With Separate Contacts

Adamiec, P.; Consoli, A.; Tijero, J. M. G.; Aguilera, Santiago; Esquivias, I.; Schwertfeger, S.; Klehr, A.; Wenzel, H.; Sumpf, B.; Erbert, G.

doi:10.1109/lpt.2013.2283198

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…Since these devices showed an excellent modulation performance up to 3 Gb s −1 with Q‐factor more than 6, and very high optical modulation amplitude (OMA) of 0.53 W, [ 7 ] it is interesting to assess their telecommunication link performance. One of the most important parameters is CNR, which can be easily estimated knowing the RIN of the transmitter, modulation bandwidth, and modulation index m , where the modulation index is the ratio between the difference and the sum of the maximum and minimum modulation power.…”

Section: Relative Intensity Noisementioning

confidence: 99%

“…One of the most important parameters is CNR, which can be easily estimated knowing the RIN of the transmitter, modulation bandwidth, and modulation index m , where the modulation index is the ratio between the difference and the sum of the maximum and minimum modulation power. [ 55 ] A large modulation scheme was applied with m = 1, and the interesting bandwidth was 1.25 GHz, resulting in a CNR of 56 dB when modulating the RW with a current of 110 mA [ 7 ] and using a RIN value of −160 dB Hz −1 presented in this paper. Recently, free space optical telecommunication is proposed for the last‐mile bottleneck, [ 56 ] where laser diodes can be used as direct modulated sources from 100 Mb s −1 to 2.5 Gb s −1 data rates per single transmitter, leading to even 220 Gb s −1 for transmitter arrays.…”

Section: Relative Intensity Noisementioning

confidence: 99%

“…[1] Moreover, the implementation of an independent driving of each section leads to: 1) further improvement in beam quality, [4] 2) gain switching with relatively low RW current resulting in short pulses and high output power, [5,6] and 3) modulation of the high output power with low RW current. [7] Adamiec et al [7] showed modulation of a two-section distributed Bragg reflector (DBR) tapered laser at a record bit rate of 3 Gb s À1 with 0.53 W optical modulation amplitude and Q-factor (indicator of the quality of the received digital signal) higher than 6 at the aforementioned bit rate.…”

Section: Introductionmentioning

confidence: 99%

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Relative Intensity Noise in a Two‐Section Distributed Bragg Reflector Tapered Laser

Adamiec,

Tijero,

Esquivias

et al. 2024

Physica Rapid Research Ltrs

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The relative intensity noise (RIN) in a two‐section distributed Bragg reflector (DBR) tapered laser emitting around 1060 nm is being studied experimentally. By analyzing the RIN spectra, a resonance frequency and damping is obtained. Herein, the dependence of the resonance frequency and the maximum RIN at the resonance frequency is studied as functions of the ridge waveguide (RW) and tapered section currents independently. The low frequency RIN is approximately −162 dB Hz−1, and the RIN peak at currents providing high output power is as low as −154 dB Hz−1. The observed nonlinearity of the squared resonance frequency with the RW section current is attributed to carrier saturation. The measured high values of the resonance frequency, exceeding 2.5 GHz for RW currents higher than 100 mA at a tapered current of 3 A, indicate gain lever enhancement.

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Section: Relative Intensity Noisementioning

confidence: 99%

Section: Relative Intensity Noisementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Relative Intensity Noise in a Two‐Section Distributed Bragg Reflector Tapered Laser

Adamiec,

Tijero,

Esquivias

et al. 2024

Physica Rapid Research Ltrs

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“…This work has been carried out in the group of Applied Photonics (GFA, Grupo de Fotónica aplicada) in the centre for advanced materials and devices for the information and In 2013 the group demonstrated direct optical modulation at 2.5 Gb/s in tapered lasers emitting at 1060 nm [38]. After that, the motivation was to achieve direct optical modulation in tapered lasers emitting at 1500 nm.…”

Section: Objectives Of This Researchmentioning

confidence: 99%

Emission characteristics of 1.5 um monolithically integrated master oscillator power amplifiers

Suárez¹,

Fernánda²

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The present work is a study of the emission characteristics of monolithic semiconductor Master Oscillator Power Amplifiers (MOPAs) relevant for their use in applications requiring simultaneously high brightness and high spectral purity semiconductor laser sources. Two types of laser devices with wavelengths ranging between 1540 nm and 1580 nm have been studied: Commercial two-section MOPAs and three-section MOPAs specially designed for their use as optical sources for Differential Absorption LIDAR. The spectral analysis of the behavior of the two-section MOPAs revealed the occurrence of undesired spectral instabilities in large ranges of driving conditions precluding their use in applications requiring stable and narrow linewidth emission. A detailed experimental analysis of the stable and unstable emission regimens has been complemented with a theoretical analysis using a Travelling Wave model. From both approaches the instabilities have been attributed to dynamic effects induced by the optical feed-back allowed by the unavoidable residual reflectivity of the front facet and mediated by self-and cross-heating effects. The three-section MOPAs have been demonstrated to be free of spectral instabilities in a large range of driving conditions. The operation of these devices under the modulation conditions required for the intended application has been demonstrated. Their emission characteristics under modulation have been analyzed paying special attention to the modulation induced spectral broadening. Evidence of a frequency modulation contribution to the broadening has been shown. The frequency modulation induced by the modulation amplitude has been attributed to the refractive index changes induced by the carrier density modulation, induced in turn by the modulating current.The work is structured in 6 chapters. In the introductory Chapter 1 the work is motivated and framed in the research line of the group. The potential of MOPAs for high brightness applications is illustrated in the case of three applications: free space optical communications, wind Lidar and Lidar for remote sensing of atmospheric gases. In Chapter 2 the main ingredients on laser diodes necessary for the proper understanding of the rest of the work are briefly summarized. The chapter includes a brief description of two concepts for increasing the brightness of semiconductor sources: tapered lasers and monolithically integrated MOPAs. A review of the state of the art in integrated semiconductor MOPAs is also included.The details of the two-section straight MOPAs and three-section bent MOPAs investigated in this work as well as a description of the experimental techniques used for their characterization are provided in Chapter 3. Specific relevance is given to the description of those set-ups and experimental techniques that were implemented or developed as a part of this work, such as the set-up for driving unmounted multi-section lasers and systematically recording the maps of the optical and Radio-Frequency (RF) spectra, the implementa...

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Rate Equation Model for the Switch‐on Dynamics of Two Section Tapered Lasers

Adamiec,

Tijero,

Esquivias

2024

Annalen der Physik

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A simplified three‐rate‐equation model is proposed to study the dynamic behavior of a two‐section high‐power tapered laser. The model includes a traveling intensity approach to calculate the photon ratios in both sections. The simulations align with the experimental data of a 1060 nm distributed Bragg reflector two‐section tapered laser. The effect of driving conditions is analyzed on the peak power and pulse duration. The pulses it obtain experimentally are ≈100 ps with 4.2 W peak power at a 900 MHz repetition rate.

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High Data Rate Modulation of High Power 1060-nm DBR Tapered Lasers With Separate Contacts

Cited by 3 publications

References 10 publications

Relative Intensity Noise in a Two‐Section Distributed Bragg Reflector Tapered Laser

Relative Intensity Noise in a Two‐Section Distributed Bragg Reflector Tapered Laser

Emission characteristics of 1.5 um monolithically integrated master oscillator power amplifiers

Rate Equation Model for the Switch‐on Dynamics of Two Section Tapered Lasers

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