High-performance single-mode fiber polarization-independent isolators

1990 ◽  
Vol 15 (8) ◽  
pp. 449 ◽  
Author(s):  
Kok Wai Chang ◽  
Wayne V. Sorin
Keyword(s):  
High Performance ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Polarization Independent

Application of Fiber Point Diffraction in Measurement of Optical Surface

2011 ◽  
Vol 55-57 ◽  
pp. 1200-1205
Author(s):  
Liang Nie ◽  
Jun Han ◽  
Xu Jiang
Keyword(s):  
High Performance ◽  
Spherical Surface ◽  
Spherical Wave ◽  
Numerical Aperture ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Optical Surface ◽  
Fiber System ◽  
Core Diameter ◽  
Fringe Contrast

The fiber point diffraction technology is applied in interferometer to measure optical surface with high precision. The wavefront diffracted from the single mode fiber with microns core diameter can be considered as ideal spherical wave and used as the referenced wave in interferometry. To estimate the quality of diffracted wavefront, the theoretical model of optical point diffraction is introduced at first. Based on the model, the influence of fiber core diameter, deformation and end-face shape on wavefront error is studied with numerical analysis. The analysis result shows that the single mode fiber used in experiment is available for instrument design and its influence over systematic error should be negligible within certain numerical aperture. Then a point diffraction interferometer with a single fiber is designed. Compared with the double fiber system, it has merit of noise immunity, high fringe contrast and high performance. Finally, the fiber point diffraction interferometer system is put up to measure spherical surface in experiment. The interference fringes are collected and analyzed with five-step shifting, least squares unwrapping and Zernike fitting method. The results show that the interferometer with optical fiber has achieved a worthy measurement precision and has great development potential.

High-performance single-mode fiber-optic switch

1994 ◽  
Vol 19 (16) ◽  
pp. 1204 ◽  
Author(s):  
S. P. Fang ◽  
H. F. Taylor
Keyword(s):  
High Performance ◽  
Fiber Optic ◽  
Single Mode ◽  
Single Mode Fiber

scholarly journals 47.5 GHz Membrane-III-V-on-Si Directly Modulated Laser for Sub-pJ/bit 100-Gbps Transmission

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 31
Author(s):  
Nikolaos-Panteleimon (Pandelis) Diamantopoulos ◽  
Suguru Yamaoka ◽  
Takuro Fujii ◽  
Hidetaka Nishi ◽  
Koji Takeda ◽  
...  
Keyword(s):  
Energy Efficient ◽  
High Speed ◽  
High Performance ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Computing Systems ◽  
Directly Modulated Lasers ◽  
Near Future ◽  
Performance Computing ◽  
Modulation Speed

Near-future upgrades of intra data center networks and high-performance computing systems would require optical interconnects capable of operating at beyond 100 Gbps/lane. In order for this evolution to be achieved in a sustainable way, high-speed yet energy-efficient transceivers are in need. Towards this direction we have previously demonstrated directly-modulated lasers (DMLs) capable of operating at 50 Gbps/lane with sub-pJ/bit efficiencies based on our novel membrane-III-V-on-Si technology. However, there exists an inherent tradeoff between modulation speed and power consumption due to the carrier-photon dynamics in DMLs. In this work, we alleviate this tradeoff by introducing photon–photon resonance dynamics in our energy-efficient membrane DMLs-on-Si design and demonstrate a device with a maximum 3-dB bandwidth of 47.5 GHz. This denotes a bandwidth increase of more than 2x times compared to our previous membrane DMLs-on-Si. Moreover, the DML is capable of delivering 60-GBaud PAM-4 signals under Ethernet’s KP4-FEC threshold (net data rate of 113.42 Gbps) over 2-km of standard single-mode fiber transmission. DC energy-efficiencies of 0.17 pJ/bit at 25 °C and 0.34 pJ/bit at 50 °C have been achieved for the > 100-Gbps signals. Deploying such DMLs in an integrated multichannel transceiver should ensure a smooth evolution towards Terabit-class Ethernet links and on-board optics subsystems.

Optomechanical design of a buckling cavity in a low-cost high-performance ferruleless field-installable single-mode fiber connector

2014 ◽  
Vol 53 (10) ◽  
pp. 106102 ◽  
Author(s):  
Evert Ebraert ◽  
Jürgen Van Erps ◽  
Stefano Beri ◽  
Jan Watté ◽  
Hugo Thienpont
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Single Mode ◽  
Single Mode Fiber

Performance and Reliability of a MEMS-based tunable optical filter operating in the 1565 nm-1525 nm wavelength range

2002 ◽  
Vol 722 ◽  
Author(s):  
T. S. Sriram ◽  
B. Strauss ◽  
S. Pappas ◽  
A. Baliga ◽  
A. Jean ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Line Width ◽  
Insertion Loss ◽  
Optical Filter ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Reliability Testing ◽  
Silicon Nitride Membrane ◽  
Tunable Optical Filter ◽  
Extensive Performance

AbstractThis paper describes the results of extensive performance and reliability characterization of a silicon-based surface micro-machined tunable optical filter. The device comprises a high-finesse Fabry-Perot etalon with one flat and one curved dielectric mirror. The curved mirror is mounted on an electrostatically actuated silicon nitride membrane tethered to the substrate using silicon nitride posts. A voltage applied to the membrane allows the device to be tuned by adjusting the length of the cavity. The device is coupled optically to an input and an output single mode fiber inside a hermetic package. Extensive performance characterization (over operating temperature range) was performed on the packaged device. Parameters characterized included tuning characteristics, insertion loss, filter line-width and side mode suppression ratio. Reliability testing was performed by subjecting the MEMS structure to a very large number of actuations at an elevated temperature both inside the package and on a test board. The MEMS structure was found to be extremely robust, running trillions of actuations without failures. Package level reliability testing conforming to Telcordia standards indicated that key device parameters including insertion loss, filter line-width and tuning characteristics did not change measurably over the duration of the test.

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