LLA – Laser Linewidth Analyzer


The LLA is a laser linewidth analyzer based on the delayed self-heterodyne interferometric technique. It consists of a high-performance LiNbO3 phase modulator as the frequency shifter in the delayed self-heterodyne interferometer. The LLA also includes high-gain photoreceiver and RF amplifier, as well as a high-resolution spectrum analyzer for accurate and convenient measurement. The high sensitivity of the LLA allows measurement and analysis of lasers with intrinsic linewidth of several kHz. An intuitive and easy-to-use GUI can provide lineshape plots and Lorentzian fitting.

➤Narrow Linewidth Laser Test
➤Phase Modulator for Frequency Shifting
➤High-Gain Photoreceiver & RF Amplifier
➤Integrated RF Spectrum Analyzer (SA)
➤Lorentzian Linewidth Fitting
➤Optional RIN Noise Test Capability

➤Laser linewidth Measurement
➤Coherent Communications
➤Research & Development
➤Test & Measurement

Functional Diagram:

Typical Linewidth Data & Fitting:

Touchscreen Display:


•Laser Wavelength: Customizable
•Optical Input Power: ≥ 7 dBm
•Fiber Delay: 10 – 100 μs, customizable
•Linewidth Test Range: 2 kHz – 100 MHz (see ordering option)
•Shift Frequency:650 MHz
•SA Frequency Range: 1 Hz to 4.4 GHz
•SA Resolution Bandwidth: 0.1 Hz to 250 kHz
•SA Dynamic Range: -151 dBm to 10 dBm
•Operating Temperature:0°C to + 50°C
•Storage Temperature:-30°C to +70°C
•Operating Humidity: 0% to 85% Relative Humidity
•Power Supply: 100 – 240 VAC, 50 – 60 Hz
•Weight:27.2 lb
•Housing Dimensions:3U, 482.60mm x 470.57mm x 132.00mm
•RF Connector: SMA female
•Optical Connector:Diamond MAS Cleanable, FC/APC Default
•Communication: USB 2.0