Linewidth in Widely Tunable Digital Supermode Distributed Bragg Reflector Lasers: Comparison Between Theory and Measurement

Ward, Ashley J. W.; Busico, G.; Whitbread, N.D.; Ponnampalam, Lalitha; Duck, J.P.; Robbins, David J.

doi:10.1109/jqe.2006.882559

Cited by 19 publications

(6 citation statements)

References 11 publications

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“…This change in shape is caused by the conversion of electrical noise in the tuning currents to low frequency optical phase noise and has previously been observed in the passive tuning devices i.e. DBR-type lasers [9,10]. The linewidth, calculated from the 20 dB spectral width averaged over 50 sweeps is shown in Fig.…”

Section: Device Characterizationsupporting

confidence: 52%

“…The lineshape of the laser has also been examined and is found, like DBR-type lasers to have a Voigt lineshape (a combination of Lorentzian and Gaussian). This kind of lineshape indicates the SFP laser exhibits enhanced low frequency noise due to electrical noise in the tuning currents [9,10]. The low linewidth of the SFP laser, combined with its low cost fabrication and wide tunability means that it may find application in dynamic phase modulated systems and particularly in the DWDM access network [11].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of a Novel Three-Section Tunable Slotted Fabry-Perot Laser

Shi

Smyth

Reid

et al. 2010

Optical Fiber Communication Conference

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Section: Device Characterizationsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Characterization of a Novel Three-Section Tunable Slotted Fabry-Perot Laser

Shi

Smyth

Reid

et al. 2010

Optical Fiber Communication Conference

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“…However, changing the grating currents has also an effect on the laser linewidth which increases from its minimum value of 1.25 MHz (measured when grating currents is 0 mA) to tens of MHz for higher currents. This lineshape change is due to the presence of additional electrical noise in the tuning currents of DBR grating of the laser [35], [36]. The consequence of this broadening is a phase and frequency jitter of the free running heterodyne signal, as seen in Fig.…”

Section: Opll Locking and Tuneabilitymentioning

confidence: 97%

Optical Phase Lock Loop as High-Quality Tuneable Filter for Optical Frequency Comb Line Selection

Bałakier

Shams

Fice

et al. 2018

J. Lightwave Technol.

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This paper describes an optical phase lock loop (OPLL) implemented as an ultraselective optical frequency comb line filter. The OPLL is based on a photonic integrated circuit (PIC) fabricated for the first time through a generic foundry approach. The PIC contains a distributed Bragg reflector (DBR) laser whose frequency and phase are stabilized by reference to an optical frequency comb generator. The OPLL output is a single-mode DBR laser line; other comb lines and noise at the output of the OPLL filter are attenuated by >58 dB below the peak power of the OPLLfilter output line. The OPLL bandwidth is up to 200 MHz, giving a filter quality factor greater than 1,000,000. The DBR laser can be tuned over 1 THz (8 nm), enabling different comb lines to be selected. Locking to a comb line with a frequency offset precisely selectable between 4 and 12 GHz is also possible. The coherence between the DBR laser and the comb lines is demonstrated by measurements of the heterodyne signal residual phase noise level, which is below −100 dBc/Hz at 5 kHz offset from the carrier. The OPLL-filter output can be up to 6 dB higher than the peak power of the comb line to be isolated by the filter. This optical gain is a unique characteristic which can significantly improve the SNR of communication or spectroscopy systems. This OPLL is envisaged to be used for high purity, tuneable microwave, millimetre-wave, and THz generation.

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“…The Digital Supermode DBR (DSDBR) tunable laser uses a novel tuning approach to achieve both high output power and wide tuning range, while simplifying tuning characteristics and hence reducing the cost of manufacture [4][5][6][7][8] . The DSDBR is a monolithically integrated, five-section device consisting of front and rear gratings, a gain section, a phase section and a Semiconductor Optical Amplifier (SOA).…”

Section: ) Introductionmentioning

confidence: 99%

Automated chip-on-carrier screening of a SOA integrated full band tunable laser (DSDBR)

Wang¹,

Dimitropoulos

Ward

et al. 2007

Optoelectronic Materials and Devices II

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Chip-on-carrier (CoC) sub-assemblies of Digital Ssupermode DBR (DSDBR) lasers are produced in high volume within Bookham manufacturing plants. These lasers can cover more than 100 ITU channels with a 50GHz channel range across the C or L band with a minimum 13dBm output power and 40dB side mode suppression ratio (SMSR). To guarantee a high quality and ensure a good yield, an automated screening process has been put in place at the CoC level to eliminate poor devices. Typical tuning maps and key performance features of the device are shown in this paper. We describe the general features of the tuning map, and indicate how a suitable operating point can be determined. The use of automated test kit is also described in this article. Finally, the performance of our device is presented in detail.

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Linewidth in Widely Tunable Digital Supermode Distributed Bragg Reflector Lasers: Comparison Between Theory and Measurement

Cited by 19 publications

References 11 publications

Characterization of a Novel Three-Section Tunable Slotted Fabry-Perot Laser

Characterization of a Novel Three-Section Tunable Slotted Fabry-Perot Laser

Optical Phase Lock Loop as High-Quality Tuneable Filter for Optical Frequency Comb Line Selection

Automated chip-on-carrier screening of a SOA integrated full band tunable laser (DSDBR)

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