Adlightec unveils new driver amplifiers

NOVEMBER 21, 2007 -- Lannion, France-based Adlightec S.A.S. recently announced several new products including a 43-Gbit/sec driver amplifier, a 40-Gbit/sec QPSK driver, and a 10-Gbit/sec driver amplifier.

43-Gbit/sec driver amplifiers
Adlightec has announced the availability of the DLM14011, its latest driver design to meet the need of electro-optic modulators used in OC-768/STM-256 optical transmission systems.

The DLM14011 is a broadband driver amplifier intended to drive Lithium Niobate or Electro-Absorption modulators with data rates up to 43 Gbits/sec. Adlightec says it is ideally suited for long-haul fiber transmission since its output delivers wide-open eye patterns with 7 Vpp of amplitude for NRZ modulation formats.

The DLM14011 amplifier electronics integrate a specially designed P-HEMT monolithic microwave integrated circuit (MMIC) to achieve low noise, ultra wide bandwidth of 100 kHz to 36 GHz with low added jitter (500fs), and excellent gain of 24 dB, say company representatives. In addition, this module incorporates an external voltage controlled gain pin (up to -3 dB) to help users simplify the gain adjustment in their transmitter design.

Overall, the DLM14011 provides exceptional performance in a low-profile package (22.4x22.8x14mm) with a single polarity power supply (+ 6V) and low power dissipation, says Adlightec. The company also offers a customization service for its 43-Gbit/sec driver model to meet customers' requirements in terms of gain flatness, bandwidth, and output power.

40-Gbit/sec QPSK driver
Adlightec's DLM12111-HG represents a new generation of high-output voltage (12Vpp) drivers specifically adapted for 40-Gbit/sec DQPSK applications.

The DLM12111-HG amplifier offers an ideal combination of amplifier performance, which makes it a versatile enough for use in both the laboratory environment or more stringent system applications. Among other features, the DLM12111-HG provides a flat bandwidth of operation from 50 kHz to 20 GHz, a 25-dBm linear output power, and a 27-dB gain, which can be voltage controlled up to -3dB, claims the company. This amplifier comes in a very compact housing package (25x25x10mm) and requires only a single power supply (12V).

For operation in a push-pull mode in QPSK or DQPSK applications, a matched pair of
DLM12111-HG is the best option to ensure good transmission performance. To meet this objective, Adlightec says it closely matches both the amplitude and phase responses of the amplifier pair.

The Adlightec DLM12111-HG also can be tailored to specific customer applications and a variety of existing hardware or modulation formats.

10-Gbit/sec driver amplifiers
Adlightec has added the DLM12012 module to its established DLM12011 driver amplifier series for OCM-192/STM-64 optical transmission system applications.

Besides its attractive price-to-performance ratio, the DLM12012 inherits most of the excellent properties of the original DLM12011 and offers a lower insertion loss, says Adlightec. In particular, it exhibits a small signal gain of 32 dB, a flat transmission bandwidth up to 9 GHz, and an 8-Vpp output voltage for NRZ modulated signals. For 10-Gbit/sec RZ modulation transmissions, Adlightec is offering an optimized low-cost companion driver, the DLM12013.

Both modules are housed in a small enclosure (25x25x10mm), with a single power supply voltage (12V) for ease of use, and feature a gain control pin that allows control of the output voltage up to -3dB.

The introduction of these low-cost DLM12012 and DLM12013 modules specifically optimized for 10-Gbit/sec NRZ and RZ applications will enable customers to choose the right driver for their modulation applications.