Little Optics unveils waveguide delay lines

Annapolis Junction, MD, April 21, 2004--Little Optics, Inc., which has invented and patented a glass high-index optical waveguide material system, Hydex, for planar lightwave circuit (PLC) fabrication, has made available 8-bit programmable delay lines based on the technology. The circuit has a series of crossbar switches that selectively route signals through either a planar time-delay element or a bypass. Applications include true-time-delay signal processors for phased-array antennas, optical-time-domain multiplexing, optical-clock distribution, and optical buffering within all-optical routers.

The company uses a "pick-and-place" stepper lithography strategy to selectively place spirals of arbitrary length onto a common bus structure. A library contains more than 400 long-path-length waveguide spirals ranging from 0.05 to 20 cm (corresponding to time delays from 3 ps to 1.2 ns) that can be integrated onto a chip that is less than 1 cm2. Using the 8-bit architecture, a device with a maximum time delay of 2.4 ns can be realized using standard photonic elements. Longer delays or devices with specific requirements can be designed if not available in the standard device library. Mode transformers are integrated into the PLC for efficient coupling into conventional single mode fibers.

Little Optics was founded in July 2000 to design and develop integrated optical devices for communications, semiconductor, defense electronics, and bio/chem sensor applications. The company's 5x-stepper lithography allows the fabrication of devices such as microring resonators, multilayer optical vias, polarization beamsplitters, polarization converters and rotators, tunable amplitude and phase filters, and crossbar switches. These elements can be stitched together to build customized circuits. On-chip mode transformers can match the modal profile of high-index waveguides to conventional single-mode fiber.


Most Popular Articles

Webcasts

Opportunities in the Mid-IR

The technology for exploiting the mid-IR is developing rapidly:  it includes quantum-cascade lasers and other sources, spectroscopic instruments of many...

Fiber Optic Sensors – Fundamentals, Principles and Applications

In this webcast, sponsored by Nufern, we focus on optical fiber sensing technology.  Fundamental concepts will be presented first, followed by the under...

Infinite Possibilities – Easily Combining Scanner and Servo Motion

High precision motion control applications such as laser micromachining, 2-photon polymerization, glass panel and film patterning, and additive manufacturing...

Solutions in Search of Problems: What Spectroscopy Can Do for You

Spectroscopy is so pervasive that most of us take it for granted. We use it for routine laboratory and test measurements without appreciating how those same ...

Technical Digests

HIGH-ENERGY LASER COATINGS: Eliminating laser damage proactively

High-power and high-energy thin-film antireflection coatings for laser optics require careful des...
Sponsored by

LIBS -- spectroscopy for remote identification of materials

Laser-induced-breakdown spectroscopy (LIBS) uses a pulsed laser to vaporize a small sample of a s...
Sponsored by

Laser Tools for Materials Processing

Laser materials processing requires not only the appropriate industrial laser system, but also a ...
Sponsored by

Click here to have your products listed in the Laser Focus World Buyers Guide.

RELATED PRODUCTS

Laser Beamsteering Mirrors

First choice for all mirror applications: Optics Balzers designs and produces flat mirr...

Fluorescence Filter Sets

Optics Balzers fluorescence filter sets include excitation and emission filters (bandpa...

Westech Optical Mirrors

Westech provides stock and custom mirrors. Spherical and flat mirrors are the most popu...

RELATED COMPANIES

Technodiamant USA Inc

Manufactures quality diamond tools including "Controlled Waviness" tools for precision ...

CVI Laser Optics

Provides solutions for semiconductor, biotechnology, materials processing and basic res...

Cirrus Photonics LLC

Provides innovative light source and optical systems solutions to address demanding tec...

Social Activity

  •  
  •  
  •  
  •  
  •  
Copyright © 2007-2014. PennWell Corporation, Tulsa, OK. All Rights Reserved.PRIVACY POLICY | TERMS AND CONDITIONS