Over 26-nm Wavelength Tunable External Cavity Laser Based on Polymer Waveguide Platforms for WDM Access Networks

Jeong, Gi Young; Lee, Jie-Hyun; Park, Mahn Yong; Kim, Cheol Young; Cho, Seung-Hyun; Lee, Wooram; Kim, Byoung Whi

doi:10.1109/lpt.2006.883184

Cited by 33 publications

(8 citation statements)

References 4 publications

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“…Significant volumes have already been manufactured for metro and core network applications, but the cost is still well above the level for access systems. External cavity lasers (ECL) with a temperature‐tuned polymer grating have also gained interest as tunable sources for access networks [7]. The tuning range is smaller than with sampled grating (SG)‐DBR devices, but they offer the advantage of direct modulation.…”

Section: Introductionmentioning

confidence: 99%

Low cost TWDM by wavelength-set division multiplexing

Pohlmann

Deppisch

Pfeiffer³

et al. 2013

Bell Labs Tech. J.

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After extensive comparison of candidate technologies, the Full Service Access Network (FSAN) Group in early 2012 made the decision to define Time/Wavelength Division Multiplexing (TWDM) as the primary solution for the next‐generation passive optical network (NG‐PON2). A minimum of four wavelengths are foreseen as providing a total capacity per feeder line of 40 Gbit/s downstream and 10 Gbit/s or more upstream. Conventional wavelength division multiplexing (WDM) lasers from core or metro networks are too expensive for fiber to the home (FTTH) systems, because every optical network unit (ONU) will need a tunable laser for upstream transmission. In this paper we will compare different technical solutions and present wavelength‐set division multiplexing (WSDM), a scheme developed by Bell Labs as the preferred solution for cost reasons. WSDM uses a laser that can be tuned by an on‐chip heater stripe. To exploit this partial wavelength tunability, we do not use contiguous wavelength bands, but wavelength‐sets consisting of cyclic interleaved wavelength slots on a fine grid. This wavelength plan can be implemented, e.g., by a cyclic arrayed waveguide grating (AWG) with a small free spectral range. We will describe the concept in detail and report on its experimental validation. © 2013 Alcatel‐Lucent.

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Section: Introductionmentioning

confidence: 99%

Low cost TWDM by wavelength-set division multiplexing

Pohlmann

Deppisch

Pfeiffer³

et al. 2013

Bell Labs Tech. J.

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“…Such problems can easily be eliminated with Bragg grating waveguides [7]. The Bragg grating waveguides achieved compactness, high performance, and cost-effectiveness, as well as integration with an optical add/drop multiplexer [8][9], an external cavity laser [10][11], an optical triplexer transceiver [12], and a dispersion compensator [13] in a wavelength division multiplexing (WDM) optical communication system.…”

Section: Introductionmentioning

confidence: 99%

Polymeric Waveguides with Bragg Gratings in the Middle of the Core Layer

Jeong¹,

Park²,

Lee³

et al. 2009

Journal of the Optical Society of Korea

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In this paper we proposed a new Bragg grating waveguide in order to improve reflectivity and to achieve compactness. Bragg gratings with various thicknesses were engraved in the middle of the core layer with a length of 3 mm. For the sake of cost-effectiveness, the 3 rd order Bragg grating waveguides were fabricated via conventional photolithography. The maximum reflectivities for the fixed width waveguide of 6 μm with the 0.1 and 0.3 μm-thick Bragg gratings were, -13.14 and -6.25 dB, respectively, and the Bragg wavelengths were 1562.28, 1564.10 nm, respectively. A slight increase in the Bragg grating thickness can result in a remarkable reduction in the length of the Bragg grating waveguide with a fixed reflectivity.

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“…Another promising light source for WDM-PON called wavelength-locked FP-LD has some problems such that its performances depend on injected power and the modulation rate is limited. Therefore a wavelength-tunable source is considered to be an ultimate solution for WDM-PON, and low-cost tunable sources have been actively sought [11].…”

Section: Introductionmentioning

confidence: 99%

“…A grating structure engraved on a polymer waveguide [11][12] or a coupled-ring reflector [3] has been employed to realize a wavelength-selective tunable reflective filter for hybrid integration. The fabrication of the grating reflector needs an additional process of engraving after the waveguide formation, which might increase the cost of the device.…”

Section: Introductionmentioning

confidence: 99%

Widely Tunable Wavelength-Selective Reflector Using Polymer Waveguide Double-Ring-Resonator Add/Drop Filter and Loop-back Mirror

Lee

Kim

Park

et al. 2008

Journal of the Optical Society of Korea

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A wavelength-selective reflector, composed of a double-ring-resonator add/drop filter and a loop-back mirror at the drop port to be used for a hybrid-integrated tunable laser is designed and fabricated. High-index-contrast polymer waveguide is used to realize a compact device as small as 2 mm x 0.4 mm. The radii of the rings are slightly different from each other to obtain a wide wavelength tuning via a vernier effect. Peak reflectivity is measured to be 52% for TE mode and polarization-dependent wavelength shift is 0.95 nm. The tuning range is measured to be about 42 nm for applied current as small as 46 mA.

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Over 26-nm Wavelength Tunable External Cavity Laser Based on Polymer Waveguide Platforms for WDM Access Networks

Cited by 33 publications

References 4 publications

Low cost TWDM by wavelength-set division multiplexing

Low cost TWDM by wavelength-set division multiplexing

Polymeric Waveguides with Bragg Gratings in the Middle of the Core Layer

Widely Tunable Wavelength-Selective Reflector Using Polymer Waveguide Double-Ring-Resonator Add/Drop Filter and Loop-back Mirror

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