Phase-Controlled Apertures Using Heterodyne Optical Phase-Locked Loops

Satyan, Naresh; Liang, Wei; Aflatouni, Firooz; Yariv, Amnon; Kewitsch, Anthony; Rakuljic, George; Hashemi, Hossein

doi:10.1109/lpt.2008.922335

Cited by 12 publications

(12 citation statements)

References 8 publications

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“…In this paper, we show that a laser with a linear frequency chirp on the order of 10 15 Hz/s can suppress, by an order of magnitude, the SBS in a high power fiber amplifier. In addition, it will allow coherent combination of multiple amplifiers and electronic compensation of path length differences on the order of 0.2 m. As a proof of principle, we demonstrate a factor of 100 suppression of the SBS gain in a 6-km fiber, with a chirp of 5 × 10 14 Hz/s.…”

Section: Introductionmentioning

confidence: 89%

“…The advantage of our seed with a well-defined linear chirp is that path length differences can be electronically compensated with an acoustooptic frequency shifter controlled by an optoelectronic phase locked loop. Similar optical phase-locked loops have already been developed to coherently combine multiple (nonchirped) diode lasers [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser

White¹,

Vasilyev²,

Cahill³

et al. 2012

Opt. Express

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Abstract:The output of high power fiber amplifiers is typically limited by stimulated Brillouin scattering (SBS). An analysis of SBS with a chirped pump laser indicates that a chirp of 2.5 × 10 15 Hz/s could raise, by an order of magnitude, the SBS threshold of a 20-m fiber. A diode laser with a constant output power and a linear chirp of 5 × 10 15 Hz/s has been previously demonstrated. In a low-power proof-of-concept experiment, the threshold for SBS in a 6-km fiber is increased by a factor of 100 with a chirp of 5 × 10 14 Hz/s. A linear chirp will enable straightforward coherent combination of multiple fiber amplifiers, with electronic compensation of path length differences on the order of 0.2 m. ©2012 Optical Society of America

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Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser

White¹,

Vasilyev²,

Cahill³

et al. 2012

Opt. Express

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“…Generally, there are two types of optical phased arrays. One scheme includes phase locking of an array of lasers to a stabilized reference laser using electro-optic phase locked loops (EOPLL) and offset the phase of individual array elements to perform beam forming and steering [5,6]. In this case, a high power beam may be formed since by coherent locking of all laser elements, the total power of the output beam could be as high as the total power of all laser elements together and an intensity that increases with the square of the number of elements for a fixed space array.…”

Section: Integrated Optical Phased Arraysmentioning

confidence: 99%

“…Although optical phased arrays (OPA) have been studied [3][4][5][6][7][8][9], they have not been widely used compared to their electrical counterparts [11,12]. However, recent advancements in integrated photonic platforms have enabled realization of reliable and compact optical phased arrays with applications in communication, LIDAR, imaging, tracking, targeting, switched fabric networks, routers, and sensing.…”

Section: Introductionmentioning

confidence: 99%

Nanophotonic projection system

et al. 2015

Self Cite

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Low-power integrated projection technology can play a key role in development of low-cost mobile devices with built-in high-resolution projectors. Low-cost 3D imaging and holography systems are also among applications of such a technology. In this paper, an integrated projection system based on a two-dimensional optical phased array with fast beam steering capability is reported. Forward biased p-i-n phase modulators with 200MHz bandwidth are used per each array element for rapid phase control. An optimization algorithm is implemented to compensate for the phase dependent attenuation of the p-i-n modulators. Using rapid vector scanning technique, images were formed and recorded within a single snapshot of the IR camera.

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“…The compactness and ease of packaging of integrated OPLLs can improve their cost effectiveness. This is especially true for the applications where multiple lasers are locked together [3], [11], [26].…”

Section: Acknowledgmentmentioning

confidence: 99%

Phase-Locked Optical Generation of mmW/THz Signals

Johansson¹,

Coldren²,

Rodwell³

2009

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Services, Directorate for Information , 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YY)2. REPORT TYPE 3. DATES COVERED (From -To) SPONSORING/MONITORING AGENCY REPORT NUMBER(S) AFRL-RY-WP-TR-2010-1073 DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution unlimited. PAO Case Number: 88ABW 2010-1316 Clearance Date: 19 March 2010. This report contains color. SUPPLEMENTARY NOTES ABSTRACTIn this report, an effort to demonstrate a highly efficient millimeter-wave (mmW) modulated optical source is summarized. This is achieved using an integrated heterodyne optical phase-locked loop (OPLL) built from monolithically integrated photonic and electronic circuits (ICs). The close integration of these ICs enables low feedback latency so that relatively wide linewidth semiconductor lasers can be used. This demonstration is a key step toward realizing compact practical OPLL mmW sources incorporating data modulation. The heterodyne frequency is ultimately limited by photodetector bandwidths, and the data rate is limited by the heterodyne frequency. It will be shown that the overall performance of the heterodyne OPLL is sufficient to demonstrate the feasibility of and a direct path towards multilevel modulation at 100Gbps data rates of a mmW carrier frequency in the 100GHz to 300GHz range. This successful demonstration of the OPLL heterodyne source is a critical demonstration required to allow electronic and photonic components, now developed for advanced future fiber optic communications systems, to be directly adopted for high capacity optical feeds to enable 100Gbps wireless links. SUBJECT TERMSOptical Phase-Locked Loop (OPLL), Integrated Circuits (IC), Millimeter Waves (mmW), Terahertz (THz) SUMMARYIn t his r eport a n ew s eedling ef fort to d emonstrate a h ighly e fficient millime ter-wave ( MMW) modulated optical source is summarized. This is achieved using an integrated heterodyne optical phase-lock loop (OPLL) built from monolithically integrated photonic and electronic ICs. T he close integration of t hese ICs enables low f eedback la tency s o th at r elatively w ide lin ewidth semiconductor lasers can be used. This demonstration is key to show a direct path to compact practical O PLL m...

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Phase-Controlled Apertures Using Heterodyne Optical Phase-Locked Loops

Cited by 12 publications

References 8 publications

Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser

Suppression of stimulated Brillouin scattering in optical fibers using a linearly chirped diode laser

Nanophotonic projection system

Phase-Locked Optical Generation of mmW/THz Signals

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