For telecommunications applications, particularly. for WDM and DWDM, tunable lasers are deemed as a viable. cost reduction for system and service providers. To lock tunable lasers onto the ITU (International Telecommunications Union) grid, wavelength lockers are required. Internal wavelength lockers are attractive to the tunable laser manufacturers because they reduce overall laser package size. In this paper, the authors will present. several generations of internal wavelength lockers developed at Digital Optics Corporation (DOC) which include etalon, based and non-etalon based front Wavesetter(TM) lockers and back Wavesetter lockers, and a Passively Aligned Wavesetter (PAWS(TM)) locker module. These Wavesetter wavelength lockers are designed for widely tunable, narrowly tunable and fixed wavelength lasers for channel spacing of 100 GHz, 50 GHz, 25 GHz, and arbitrary spacing (the PAWS locker module). DOC implemented its Photonic Chip(TM) integrated optics platform for the design and manufacture of these Wavesetter wavelength lockers, which feature compact size and low manufacturing cost through higher levels of integration.. In this paper, we present results from design, simulation, fabrication, and testing of these different generations of wavelength lockers.

To achieve the channel stability required by DWDM systems, lasers must be locked onto particular channels on the ITU grid. This paper details and compares two methods used for integration of wavelength lockers: assembly of discrete components and functional integration. Effective integration of wavelength lockers involves not only assembling the components, but in functional integration as well. The net device can improve performance as well as aid the laser manufacturer in module level integration.

Wafer scale manufacturing techniques for making both multi-phase level diffractive optics and micro refractive optics feature low manufacturing cost, compact size, and light weight. The integration of the micro optics with lasers, detectors, and optical waveguides enables many new applications where size, weight, and cost are crucial. In this paper, we will report our results on the integrated micro optical systems (IMOS) which contain VCSEL array, detector array, edge emitting lasers, and fiber array for opto-electronic and fiber optic applications

Silicon v-groove structures have been utilized for passive positioning of optical fiber for fiber optic and opto- electronic applications. In this paper, we will present our results of using micro-machined silicon v-groove arrays to passively align optical fiber arrays to micro rod optics. We will also demonstrate the integration of N fiber arrays bonded into the silicon v-groove with a 1xN micro lens array, which is composed of a 2 inch-phase level diffractive optics. For the assembly of 1x6 fiber array and lens array with 16 phase level diffractive optics, the experimental results indicated that total insertion loss per link is typically 1.5-2.0 dB/channel.