Zygo 1115-801-346 laser head cable 

Product core positioning

ZYGO 1115-801-346 is a dedicated signal transmission cable for laser heads. Its core function is to achieve synchronous transmission of optical and control signals between ZYGO specific model laser heads, measurement electronic boards, and interferometer modules. As an exclusive supporting component of ZYGO precision measurement ecology, it is designed for the low-noise signal output characteristics of laser heads. Through optimized impedance matching and shielding structures, it ensures the "zero distortion transmission" of the core light source signal in laser interferometry measurement, which is the basic link to ensure sub nanometer measurement accuracy.

Key technologies and performance parameters

Parameter category

Core indicators (derived based on ZYGO laser head cable standards and industrial grade characteristics)

Transmission signal type

Composite transmission of laser interference signals (633nm/1 μ m wavelength adaptation), equipment control signals, and status feedback signals

Interface specifications

One end is a customized interface for laser heads (compatible with ZYGO specific models of mechanical positioning and signal pins), and the other end is a standard measurement system interface (compatible with ZMI series electronic boards)

Conductors and shielding

Adopting silver plated oxygen free copper conductor (to reduce high-frequency signal attenuation), three-layer shielding structure (aluminum foil+copper weaving+grounding shielding mesh, shielding coverage ≥ 99%), to suppress EMI/RFI interference

Insulation and sheath

Fluoropolymer insulation (dielectric constant ≤ 2.1, suitable for low loss transmission of laser signals), oil and temperature resistant polyolefin sheath (working temperature -40 ℃~105 ℃)

Typical length

The standard specifications are 2m and 3m (standard installation distance between laser head and electronic board), and support customization up to 8m (signal compensation module required)

Signal integrity

Characteristic impedance 50 Ω± 2 Ω (standard impedance of laser signal), insertion loss ≤ 0.2dB/m @ 1GHz, return loss ≥ 25dB

Durability

The interface has a plug-in life of ≥ 1500 times, a bending radius of ≥ 8 times the cable outer diameter (static), and ≥ 12 times the cable outer diameter (dynamic), and has passed 1 million bending tests

Exclusive adaptation characteristics and core advantages of laser head

1. Optimization design of laser signal transmission

As the "light source core" of the interferometric measurement system, the stability of the output signal of the laser head directly determines the measurement accuracy. The cable has undergone triple optimization for the signal characteristics of the ZYGO laser head:

Wavelength adaptation: The insulation material and conductor layout are specifically matched for 633nm (helium neon laser) and 1 μ m (near-infrared laser) signal transmission, avoiding signal dispersion problems at different wavelengths;

Low noise transmission: The combination of silver plated conductors and three-layer shielding can suppress the influence of external electromagnetic interference on laser signals to below 0.05 nm, far superior to ordinary industrial cables;

Synchronous transmission capability: While transmitting laser interference signals, synchronously transmit control signals such as power control and temperature adjustment of the laser head, with a delay deviation of ≤ 20ps, ensuring stable output of the light source.

2. Compared to the core value of general cables

Compared to the previously analyzed general high-speed cables such as 1115-800-055, this laser head specific cable has three exclusive advantages:

Customized interface adaptation: The laser head end adopts ZYGO factory customized interface to achieve precise matching between mechanical positioning and signal pins, avoiding the problem of poor contact of universal interfaces;

Laser signal directional optimization: Design transmission links based on the monochromaticity and coherence characteristics of laser interference signals, rather than general high-speed digital signals, reducing signal loss by more than 40%;

Stronger system collaboration: Built in identity recognition pin, which can be automatically recognized by ZMI electronic board for cable model and status, achieving linkage calibration between laser head and measurement system.

Adapt devices and application scenarios

1. Core adaptation system components

Based on the ZYGO laser interferometry ecosystem, the typical adaptation combinations are as follows:

Signal transmitter (laser head): ZYGO 7702/7714 classic laser head, 7730 new generation high-power laser head (used for high-end scenarios such as the "Shenguang" project);

Signal receiving end: ZYGO ZMI 4104C measurement electronic board, ZMI 6100 high-end control unit, differential interferometer (DPMI) signal input module;

Adaptation system: Semiconductor lithography machine dual stage measurement system (provided by Huazhuo Jingke), high-end CNC machine accuracy calibration system, astronomical telescope optical measurement system.

2. Key application scenarios

Semiconductor manufacturing: In 28nm and above process lithography machines, connect the ZYGO laser head to the ZMI electronic board, transmit stable laser signals for silicon wafer stage positioning measurement, and ensure that the etching accuracy error is ≤ 1nm

Precision machine tool calibration: Cooperate with ZYGO laser interferometer to calibrate the accuracy of LODTM grade diamond lathe in the United States, and transmit laser signals stably through cables to achieve measurement accuracy of 2.5nm level;

High end optical testing: In the optical component testing platform of Shanghai Institute of Optics and Fine Mechanics, a laser head is connected to an interferometer to transmit high-precision laser signals for 800mm aperture lens testing;

Research field: In the laser interference positioning module of atomic force microscopy (AFM), a dedicated signal link is provided for the laser head to support nanoscale surface morphology measurement.

Precautions for use and maintenance standards

1. Installation and operation requirements

Interface connection: The laser head interface should be aligned with the positioning slot and slowly inserted. Tighten the fixing nut (if designed with threads) to avoid pin bending; The measurement system needs to confirm the locking of the buckle to prevent vibration loosening;

Wiring specifications: Cables should be laid separately and kept away from power cables (spacing ≥ 60cm) to avoid bundling with other signal cables and reduce signal coupling; Do not press cables under equipment or bend them at sharp angles;

Environmental control: Avoid use in environments with strong light and dust concentration greater than 0.1mg/m ³. The laser head interface should be equipped with a dust cap (when not connected) to prevent pollutants from entering and affecting signal transmission;

Electrostatic protection: An anti-static wristband (grounding resistance ≤ 1M Ω) must be worn before operation. The ESD protection level of the laser head interface chip is 1000V, and unprotected insertion and removal are strictly prohibited.

2. Maintenance and troubleshooting

Regular maintenance: Clean the interface monthly (wipe with lens paper dipped in specialized optical cleaner), test the transmission performance quarterly with ZYGO signal analyzer, and replace it promptly if the insertion loss is greater than 0.3dB/m;

Troubleshooting: If there is a laser signal interruption, first check whether the cable sheath is damaged and whether the interface is contaminated; Replace the spare cable for testing, eliminate cable faults before testing the laser head or electronic board interface;

Replacement principle: ZYGO original cables must be used. Third party cables may cause fluctuations in laser head power (± 5% or more) due to interface mismatch or insufficient shielding, resulting in measurement errors increasing from 0.5nm to 10nm or more.

Comparison of core differences with other ZYGO cables

Comparing dimensions

ZYGO 1115-801-346 (laser head specific)

ZYGO 1115-800-055（HSSDC2-HSSDC2）

ZYGO 1115-800-056（HSSDC-HSSDC2）

Core purpose

Signal transmission between laser head and system

Same interface high-speed data direct connection

Data conversion and transmission through different interfaces

Signal type

Laser interference signal+control signal

High speed digital measurement data

High speed digital measurement data (including conversion)

Interface characteristics

Customized laser head interface on one end

Standard HSSDC2 interface at both ends

One end HSSDC, one end HSSDC2

Shielding level

Triple layer shielding (≥ 99%)

Double layer shielding (≥ 98%)

Double layer shielding (≥ 95%)

Typical adaptation scenarios

Connection between laser head and electronic board

New equipment high-speed direct connection

Compatible connection between new and old devices