fiber laser

Pulsed MOPA Fiber Laser 脉冲光纤激光器

与市面上流行的Q开关的连续光纤激光器相比较，脉冲光纤激光器的最大优势是：采用激光振荡级加放大级结构，激光脉冲宽度、脉冲形状、单脉冲能量和脉冲重复率可以相互独立地任意设定和编程控制，特别适合高精密激光加工应用，如激光医疗、激光微加工、激光打标雕刻等精细加工。

Our advanced and cost-effective pulsed fiber lasers are based upon a MOPA architecture (Master Oscillator Power Amplifier). Specific models are designed for applications requiring low-cost and high performance, while other models incorporate features enabling a unique control of optical pulses.

The pulsed MOPA architecture uses a Pulsed Seed Laser as a seed source, thus allowing for pulsewidths and repetition rates that can be independently adjusted or externally programmed over wide ranges. The Pulsed MOPA Fiber Lasers can be provided either in very compact OEM enclosures suitable for integration into highly cost sensitive laser machines or systems, or alternatively in an air-cooled 19” rack-mountable enclosure optimized for modularity and easy future upgrade.

The Pulsed Seed Laser (PSL) and the 50 mW, 1 W and 10 W Yb-Doped Fiber Amplifiers (YDFA) are also separately offered as compact OEM modules to allow the customer to quickly realize the full potential of their proprietary seed sources or amplifier stages.

We will work closely with its customers to ensure a seamless integration.

Key features and advantages

l Modular product line: compact OEM or 19” rack-mountable enclosures

l Widely adjustable pulse width and repetition rate

l Polarization maintaining (PM) and non-PM models

l Optional delivery solution, pigtail or collimated

Our laser design is different from others as we use a master-oscillator, power-amplifier (MOPA) design, and our seed laser enables the pulse width, shape, amplitude, repetition rate, etc. to be independently varied over a wide range, which is not possible with Q-switched lasers. Depending upon the customer's requirements, the pulse can be controlled with an analog input (the MOPA laser works as an analog electrical to optical converter), or the pulse shape can be pre-programmed and simply triggered using a TTL input.

Yb-Doped Fiber Amplifier (YDFA)

Model	YDFA-SM-17	YDFA-HP-01	YDFA-HP-10	YDFA-HP-20	Unit
Wavelength range	1030-1080	1030-1080	1030-1080	1030-1080	nm
Average output power	0.05	1	10	20	W
Saturation input power	1	50	1000	2000	mW
Mode of operation	CW or pulsed	CW or pulsed	CW or pulsed	CW or pulsed
Repetition rate(For pulsed operation)	100-1000	100-1000	100-1000	100-1000	kHz
Pulsewidth(For pulsed operation)	10 - 250	10 - 250	10 - 250	10 - 250	ns
Dimensions (WxDxH)	120x90x14	158x252x70	158x252x38	158x252x38	mm

Pulsed MOPA Fiber Laser

Model	MOPA 1	MOPA 10	MOPA 20	Unit
Wavelength range	1030 - 1080	030 - 1080	1030 - 1080	nm
Average output power	1	10	20	W
Repetition rate	100 - 1000	100 - 1000	100 - 1000	kHz
Pulsewidth	10 - 250	10 - 250	10 - 250	ns
Pulse energy (100kHz, 200nsec)	10	100	200	μJ
Dimensions (WxDxH)	482x460x221 (for 19” rack-mountable enclosure)			mm

Typical output power of YDFA-HP-10

Pulsed Seed Laser, 1 μm (OEM module)

We offer a state-of-the-art Pulsed Seed Laser as a high performance, compact and cost effective OEM module. The module is designed as a pulsed seed laser source for feeding Yb-doped fiber booster amplifiers or other appropriate optical amplifiers to produce high energy pulses with pulsewidth and repetition rate that are selectable over wide ranges, as apropriate for marking, micromachining, medical and other applications. The module also serves as an excellent source for fiber-optic sensing.

Our Pulsed Seed Laser is designed to operate as an analogue electrical-to-optical converter for low duty cycle pulsed signals, thus allowing pulse shaping within the module´s bandwidth of approximately 100 MHz.

An external electrical pulse generator is used to drive the pulsed seed laser at the desired pulsewidth and repetition rate. The module incorporates temperature and bias control electronics, as well as a pulse driver amplifier that is matched to the laser module and accepts a 0 – 2 V electrical input pulse modulation.

The module generates optical pulses with a pulsewidth selectable between 10 ns and 250 ns, and a repetition rate selectable from single shot up to 500 kHz.

Figure - The Pulsed Seed Laser operates as an electrical-to-optical converter for low duty cycle pulsed signals, thus allowing pulse shaping within the module´s bandwidth of approximately 100 MHz

Key features and advantages

l Center wavelength in the range 1030 nm - 1080 nm

l Pulse peak power up to 0.75 W

l Operates as fast electrical-to-optical converter with 100 MHz bandwidth

l Pulsewidth and repetition rate can be selected over wide ranges

l Pulsewidth range: 10 ns - 250 ns

l Repetition rate range: Single-shot - 500 kHz

l Narrow spectral width option available (<0.5 nm)

l Internal bias and temperature control electronics

Robust OEM enclosure with integrated heat sink

Typical optical specifications

Center wavelength	Min. 1030 nm; Max. 1080 nm
Center wavelength tolerance	± 2 nm
Center wavelength stability	± 0.5 nm
Spectral width at 3dB Standard	min. 1 nm; max. 3 nm Optional: <0.5 nm, by Fiber Bragg Grating
Optical peak power ¹	0.75 W
Pulsewidth ²	Min. 10 ns; Max. 250 ns
Repetition rate ²	Min. Single shot; Max. 500 kHz
Duty cycle ²	< 2 %
ASE/Signal average power ratio	< 2 %

Remark: 1. Output peak power may vary with center wavelength

2. At 10% reduction in output peak power

Typical pulse oscilloscope traces

Electrical, mechanical and environmental specifications

Pulse modulation	signal 0 V - 2 V into 50 W
External power supply	7.5 V DC
Power consumption at 25C	< 3 W
Dimensions (WxDxH)	120 mm x 90 mm x 14.2 mm
Operating temperature	Min. 5 C; Max. 55 C
Storage temperature	Min. -5 C; Max. 80 C

Ordering information and options

Model number: PSL10-[WL]-[SW]-[FP]-[OI]-[CT]

Example: PSL10-1064-0-0-0-0

[WL] Center wavelength

1064 Standard: 1064 nm (±2 nm)

10xx Other center wavelength (±2 nm): Please specify in range 1030 nm - 1080 nm

[SW] Spectral width

0 Standard, typical value at 3 dB: min. 1 nm; max. 3 nm

1 <0.5 nm, by Fiber Bragg Grating

[FP] Fiber pigtail

0 Standard, non-PM: Corning HI 1060 or equivalent

1 PM980

[OI] Optical isolator

0 Standard: without optical isolator

1 With non-polarizing optical isolator

2 With polarizing optical isolator (for FP=1 only)

[CT] Connector

0 Standard, non-PM: FC/APC connector

1 With FC/APC connector aligned with slow axis (for FP=1 only)

2 No connector

3 Custom termination; please specify

Note: An external power supply module can be provided on request

Compact Laser Diode Driver

The Compact Laser Diode Driver (cLDD) is an all-in-one unit that combines (a) a user interchangeable mount appropriate for a laser diode, SLED, SOA or similar device, (b) a low noise current driver and (c) a TEC controller, all in a self-contained enclosure of exceptional design, engineering and convenience.

The product includes a USB port and a user-friendly JAVA software application for realtime device monitoring, control and data logging, and can be operated in 3 ways:

1) stand-alone, using the built-in keypad and display to change and/or monitor the mode of operation - either constant current or constant power - and/or the set points for device current, power and temperature, or

2) connected to a computer via its USB port and fully controlled by the included JAVA software application that provides a virtual instrument user interface offering real-time readouts and data logging, or

3) as part of an automated setup via its USB port and either the included software application or available LabView™ drivers that can also be provided on request.

At any time, the selected mode of operation - constant current or constant power -, device current, power and temperature can be changed from either the included software application or the built-in keypad/display. We suggest that the included software application be used initially to input device configuration, alarm and safety parameter values, as the equipment incorporates hardware device protection features like slow current ramp-up, current and temperature limits that should be preset for each specific device. External modulation capability of the device current is included as standard feature.

The Compact Laser Diode Driver is equipped with either a 14 pin Butterfly mount (including routing boards for Type I, Type II and custom pinout devices) or a DIL mount. The mounts are user-interchangeable and can be purchased separately. The cLDD can be mounted on 1” grid or metric surfaces, horizontally or vertically, using provided parts.

Key features and advantages

l Self-contained enclosure combines and incorporates:

1) Device mount (for Butterfly or DIL LD/SLED/SOA, user-interchangeable)

2) Device current driver and TEC driver

3) Sophisticated control electronics and firmware

l No special laser-controller and/or TEC cables required

l External modulation capability

l Exceptional design and engineering

l USB computer interface and user-friendly JAVA software application that combines:

1) Installation and configuration wizard

2) Virtual instrument user interface offering full device control, real-time readouts, parameter setting and updating, data logging, error signaling and diagnostics

Typical specifications

Device current	Max. 1 A (Max. 2 A as option)
TEC driver current	Max. 4 A
External analog modulation	>500 kHz (3 dB), AC coupled
External power supply	100-240 V AC, 50-60 Hz, to 5 V DC, 5 A
Dimensions (WxDxH)	135 mm x 200 mm x 45 mm (with 14 pin Butterfly mount included)

Software installation wizard and control application

As a standard feature of the Compact Laser Diode Driver, our user-friendly JAVA software application allows an easy initial configuration of the mounted laser diode, SLED or SOA. As standard feature, Windows and Linux are supported, but we can also provide LabView™ drivers. Using the software application, the user can input device safety parameter values, establish and change the desired mode of operation - either constant current or constant power - and/or the set points for device current, power and temperature. Configuration files are saved to the user’s computer, for later use. The application also provides a virtual instrument user interface offering real-time readouts through which the operation of the mounted device can be fully monitored and controlled.

Included items

l Compact Laser Diode Driver, equipped with chosen device mount. For Butterfly mount options, three routing boards are included: Type I, Type II and user configurable

l External AC/DC Power Supply (110-240 V AC to 5 V DC, 5 A)

l CD-ROM with User Guide, JAVA installation wizard and control application

l Mounting brackets and screws

Ordering information and options

Model number: cLDD-[DC]-[DM]

Sample: cLDD-1-B

[DC] Device current

1 Max. 1 A

2 Max. 2 A

[DM] Device mount

B With 14 pin Butterfly mount (for DC=1 or DC=2)

D With DIL mount (for DC=1 only)

I With 14 pin Butterfly mount. User-interchangeable DIL mount also provided (for DC=1 only)

Note: The Butterfly and DIL device mounts are user-interchangeable, and either mount can be purchased separately to reconfigure the product. For this purpose, use model number ‘B-Mount’ for the 14 pin Butterfly mount, and ‘D-Mount’ for the DIL mount.